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This study aims to evaluate the genomic effects of vitamin D (VitD) on steroidogenesis, sperm structure, and function in mice models with artificially induced vitamin D deficiency (VDD), while maintaining calcium and phosphorus homeostasis. qRT‐PCR was utilized to measure the steady‐state RNA levels of key steroidogenic genes, including CYP11A1, CYP19A1, 17βHSDH1, 3βHSDV1, and CYP24A1, involved in VitD metabolism, in testicular extracts from mouse models with varying degrees of VDD severity. Estradiol, testosterone, luteinizing hormone (LH), and follicle‐stimulating hormone (FSH) levels were also assessed. Furthermore, testicular histomorphometric analysis and evaluation of sperm structural and functional parameters were conducted. The study reveals a linear decrease in the expression of monitored steroidogenic genes with increasing severity of VDD. Moreover, in cases of mild and moderate VDD, testicular extracts exhibited significantly reduced levels of LH, estradiol, and testosterone. VDD has substantial effects on testicular steroidogenesis, which directly impacts spermatogenesis, independent of its established role in calcium regulation. Consequently, the reduction in steroidogenesis due to VDD contributes to the diminished efficiency of testicular spermatogenesis in individuals experiencing VDD, a prevalent condition worldwide. [ABSTRACT FROM AUTHOR]

Intralesional steroids commonly used for keloid treatment have adverse effects like cutaneous atrophy and telangiectasias. Safer and more effective therapies are needed. Preliminary studies suggest intralesional vitamin D as a potential alternative treatment. The aim of this study was to compare efficacy and safety of intralesional vitamin D with triamcinolone for keloids, and correlate tissue expression of vitamin D receptors (VDRs) with treatment outcomes. Sixty patients were randomly assigned to two groups: Group A (intralesional vitamin D) and Group B (intralesional triamcinolone). Four injections were given at 4‐week intervals, with an 8‐week follow‐up. Biopsies were taken pre‐ and post‐treatment to examine VDR expression levels and treatment response correlation. The primary outcome of interest was the proportion of patients achieving a 50% reduction in Vancouver Scar Scale (VSS). Secondary outcomes included incidence of adverse effects, and changes in VDR expression before and after treatment. Baseline VSS scores were 9.73 ± 1.01 (vitamin D group) and 10.13 ± 1.07 (triamcinolone group). After treatment, mean VSS decreased to 5.17 ± 0.59 (vitamin D group, p < 0.001) and 4.77 ± 0.77 (triamcinolone group, p < 0.001), with significantly better response in latter (p = 0.03). More than 50% reduction in VSS score was higher in the triamcinolone group (76.7% vs. 50%, p = 0.032). No recurrences were noted during the 8‐week follow‐up. Hypopigmentation (80% vs. 36.7%, p < 0.001) and atrophy (73.3% vs. 40%, p = 0.009) were more common in the triamcinolone group. No significant difference in pre‐ and post‐treatment VDR receptor expression was observed in either group. Both triamcinolone acetonide and vitamin D were effective for keloids. Triamcinolone was more efficacious, whereas vitamin D was safer, suggesting it as a viable alternative for keloid management. [ABSTRACT FROM AUTHOR]

Summary Multigrain bread being nutritionally rich and convenient is one of the popular dietary options these days, particularly among urban dwellers. In this study, the effects of oyster mushroom powder (0–10%) supplementation on the nutritional, antioxidant, physical, textural, microstructural, and sensory attributes of multigrain bread were explored. Results showed a significant (P < 0.05) enhancement in the bread's nutritional profile, with increased levels of protein, fibre, vitamin D, iron, potassium, manganese, and zinc, along with improved antioxidant properties. Microstructural analysis revealed that mushroom powder caused rougher and more inhomogeneous starch granules in the crumb. Although the incorporation of mushroom powder led to denser, harder, and more fragile bread, as indicated by physical and textural changes, sensory evaluation indicated that up to 5% supplementation did not negatively impact consumer acceptability (P > 0.05). These findings suggest that oyster mushroom powder can be a beneficial functional ingredient in multigrain bread, enhancing its nutritional value while maintaining sensory quality. [ABSTRACT FROM AUTHOR]

Assisted reproductive technologies (ARTs) are performed worldwide in the equine industry to produce genetically valuable foals. Among them, ovum pick up (OPU) combined with intra‐cytoplasmic sperm injection (ICSI) can now be more efficient than embryo transfer (ET) under optimal conditions. However, OPU is not a benign procedure for the mare and the process is costly. Improved efficiency is therefore in the interest of everyone, maximizing mare welfare and optimizing economics for the client. One of the key factors of success is the antral follicle count (AFC) at the time of OPU and subsequently the number of oocytes obtained. Variations in AFC are reported between individuals and between geographical areas. This leads to a significant increase in numbers of embryos produced per session in some countries compared to others, independent of the laboratory efficiency. This article revisits the basics of folliculogenesis involved in establishment of the antral follicle population and explores work in other species given the paucity of equine research in this area. The aim of the review is to elucidate interesting areas of further research that could generate essential information for clinicians and clients about the management and selection of the donor mare for OPU and potentially identify pharmacological targets for manipulation. [ABSTRACT FROM AUTHOR]

Aim Methods Results Conclusion Although vitamin D deficiency in smokers has a greater risk of low birth weight than vitamin D deficiency or smoking alone, there is no study searching birth weight in vitamin D deficient passive smokers. We evaluated the effect of vitamin D deficiency on birth weight in active and passive smokers. Additionally, we aimed to determine the predictive role of vitamin D for low birth weight in smokers.The study was designed as a retrospective case control study. A total of 210 participants were divided into three groups: active smoking (n = 34), passive smoking (n = 79), and non‐smokers (n = 97). Then passive smokers were divided into two subgroups as vitamin D ≥ 20 ng/mL (n = 23) and vitamin D < 20 ng/mL (n = 56). Sociodemographic, laboratory, and perinatal characteristics were recorded and compared between groups.Birth weight was higher in non‐smokers as compared to active (p < 0.001) and passive (p = 0.001) smokers, and also in passive than active smokers (p = 0.023). In passive smokers, birth weight was lower in vitamin D < 20 ng/mL group (p < 0.001). Vitamin D were correlated with birth weight in all smokers (r = 0.653, p < 0.001), passive (r = 0.624, p < 0.001) and active smokers (r = 0.526, p = 0.001). Vitamin D ≤ 14 ng/mL predicted low birth weight with 100% sensitivity and 53.92% specificity in smokers (area under curve [AUC] = 0.773, p < 0.001), with 100% sensitivity and 63.5% specificity in passive smokers (AUC = 0.759, p < 0.001) while vitamin D ≤ 11 ng/mL predicted with 83.33% sensitivity and 71.43% specificity in active smokers (AUC = 0.774, p = 0.008).Vitamin D deficiency in smokers is associated with low birth weight. Although vitamin D supplementation is not routinely recommended in pregnant women, we suggest that it could be an option in preventing low birth weight in smokers, even passive ones, who do not have adequate dietary intake and have insufficient exposure to daylight. [ABSTRACT FROM AUTHOR]

Background and Aims Methods Results Conclusion Cardiovascular disease is the leading cause of death in patients with chronic kidney disease (CKD) and has been associated with abnormalities of mineral metabolism and vascular calcification. Vitamin D influences parathyroid hormone values and calcium and phosphate metabolism, and may play a role in vascular function and bone health. We aimed to test our hypothesis that vitamin D deficiency is associated with arterial stiffness, aortic calcification and lower bone mineral density (BMD) in patients with CKD.A cross‐sectional analysis was performed using baseline data from the IMpact of Phosphate Reduction On Vascular Endpoints in CKD (IMPROVE‐CKD) study cohort. Clinical and laboratory parameters were compared between those with and without vitamin D deficiency, defined as 25‐hydroxyvitamin D (25(OH)D) <50 nmol/L. Univariable and multivariable linear regression analyses were performed to assess associations between serum 25(OH)D levels and pulse wave velocity (PWV), augmentation index (AIx), abdominal aortic calcification (measured by the Agatston score) and lumbar spine BMD.Baseline 25(OHD) values were available in 208 out of 278 IMPROVE‐CKD study participants, with a mean value of 70.1 ± 30.7 nmol/L. Of these, 57 (27%) patients had vitamin D deficiency. Those with 25(OH)D deficiency were more likely to have diabetes (56% vs 38%), cardiovascular disease (54% vs 36%) and lower serum calcium (2.29 ± 0.13 vs 2.34 ± 0.13 mmol/L). On univariable and multivariable regression analyses, baseline 25(OH)D values were not associated with PWV, the AIx, Agatston score or BMD.Baseline 25(OH)D levels were not associated with intermediate markers of vascular function and BMD in patients with CKD stages 3b and 4. [ABSTRACT FROM AUTHOR]

Objective: The study aims to determine the vaccination status of children and evaluate the relationship between vaccination rates, vaccine attitudes, and some parental health practices. Design and Methods: This cross‐sectional study was conducted with 674 mothers. Data were collected using a survey evaluating vaccine characteristics, some infant health practices, and The Public Attitude Toward Vaccination Scale—Health Belief Model. Chi‐square test, independent samples t‐test, and logistic regression analysis were used. Results: 80.2% of children were fully vaccinated. The rate of non or under‐vaccination was higher in the group that did not regularly undergo follow‐up for 0–2‐year‐old children, did not fully have health screenings, did not use vitamin D and iron supplements, and used alternative medicine. Moreover, the duration of breast milk feeding, the transition to supplementary food, and the duration of vitamin D use in the non‐fully vaccinated group were lower than in the fully vaccinated group (p <.05). The increase in maternal education period and severity and benefit attitude scores of vaccine attitude were the factors that decreased the rate of non‐fully vaccination. The increase in barrier scores toward vaccines increased the rate of non or under‐vaccination. Conclusion: Mothers who have negative attitudes toward vaccination have negative behaviors in health practices and screenings on infant/child health. [ABSTRACT FROM AUTHOR]

The effect of acute exercise on circulating concentrations of vitamin D metabolites is unclear. To address this knowledge gap, we examined the effect of a bout of treadmill‐based exercise versus rest on circulating concentrations of 25(OH)D3, 25(OH)D2, 3‐epi‐25(OH)D3, 24,25(OH)2D3, 1,25(OH)2D3, and vitamin D2 and D3 in healthy men and women. Thirty‐three healthy adults (14 females, 41 (15) years, body mass index 26.2 (3.7) kg/m2, V̇O2max${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}{\mathrm{max}}}}$ 36.2 (9.2) ml/kg/min; mean (SD)) completed two laboratory visits involving 60 min of moderate‐intensity treadmill exercise (60% V̇O2max${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}{\mathrm{max}}}}$) versus 60 min of seated rest, both in an overnight fasted‐state, as part of a randomised crossover design. Venous blood samples were drawn at baseline, immediately (0 h), 1 h and 24 h after the exercise or rest‐period. There was a significant time × trial interaction effect for total circulating 25(OH)D (P = 0.0148), 25(OH)D3 (P = 0.0127) and 1,25(OH)2D3 (P = 0.0226). Immediately post‐exercise, 25(OH)D, 25(OH)D3 and 1,25(OH)2D3 concentrations were significantly elevated compared to the control resting condition, and 1,25(OH) 2D3 remained significantly elevated 1 h later. Circulating albumin, vitamin D binding protein, calcium and parathyroid hormone were elevated immediately post‐exercise. Thus, an acute bout of moderate intensity exercise transiently increases concentrations of circulating 25(OH)D and 1,25(OH)2D3 compared to resting conditions. Key points: Observational studies suggest that acute exercise might change circulating concentrations of vitamin D metabolites, but this has not been investigated using randomised crossover studies and using robust analytical procedures.In this study, we used a randomised crossover design to examine the effect of a bout of treadmill‐based exercise (vs. rest) on circulating concentrations of a wide range of vitamin D metabolites in healthy humans.We show that an acute bout of moderate intensity exercise transiently increases concentrations of circulating 25(OH)D and 1,25(OH)2D3 compared to resting conditions.These findings indicate that regular exercise could lead to transient but regular windows of enhanced vitamin D biological action. [ABSTRACT FROM AUTHOR]

Use of food supplements (FS) by athletes is well characterised but there is little information on 'herbal' or 'botanical' FS beyond 'natural'. This study determined, by questionnaire, whether athletes' main self‐reported reason for using FS was reflective of what was written on product labels or, when these claims were unavailable, was in accordance with the scientific literature. In 217 elite (n = 55) and amateur (n = 162) athletes living on the island of Ireland, 71% (n = 153) consumed any kind of FS, with 16% (n = 34) of the entire cohort deemed botanical consumers. 'Protein' (21%, n = 46), 'vitamin D' (17%, n = 37) and 'vitamin C' (15% n = 32) were most consumed with the top reasons for use being 'to support health', 'to prevent illness/for immunity purposes' and 'recovery'. There was generally good agreement between approved nutrition and health claims for such products and athletes' main reported reasons for use. Only the amateur athletes in our pool described using botanical supplements, with reasons for use stated as 'sleep improvement' (21%), 'recovery' (14%), 'supporting health' (12%) and 'energy' (12%), resulting in poor agreement with either approved claims or scientific evidence. Only half of amateur athletes knew if their botanical FS were third‐party tested. Athletes and practitioners require guidance to avoid consuming supplements for which there is little scientific evidence, and which may risk being contaminated/fraudulent. [ABSTRACT FROM AUTHOR]

Background: Vitamin D (VD) deficiency is common among patients with atopic dermatitis (AD) and often associated with severity. However, randomized trials of VD supplementation in AD have had equivocal results, and there is little information regarding the effect of VD supplementation on type 2 immunity in AD patients. Objectives: To investigate the efficacy of VD supplementation to decrease severity of AD and to alter type 2 immunity biomarkers. Methods: We performed a randomized, double‐blind, placebo‐controlled trial. We randomly assigned 101 children with AD to weekly oral vitamin D3 (VD3) or placebo for 6 weeks. The primary outcome was the change in the Severity Scoring of AD (SCORAD). Results: Mean age of subjects was 6.3 ± 4.0 years, and baseline SCORAD was 32 ± 29. At baseline, 57% of children were VD deficient, with no difference between groups. Change in 25(OH)D was significantly greater with VD3 than placebo (+43.4 ± 34.5 nmol/L vs. +2.3 ± 21.2 nmol/L, p < 0.001). SCORAD change at 6 weeks was not different between VD and placebo (−5.3 ± 11.6 vs. −5.5 ± 9.9, p = 0.91). There were no significant between‐group differences in change of eosinophil counts, total IgE, Staphylococcal enterotoxin specific IgE, CCL17, CCL22, CCL27, LL‐37 or Staphylococcus aureus lesional skin colonization. Vitamin D receptor (VDR) gene single nucleotide polymorphisms FokI, ApaI and TaqI did not modify subjects' response to VD supplementation. Conclusions: Among children with AD, weekly VD supplementation improved VD status but did not modify AD severity or type 2 immunity biomarkers compared to placebo (ClinicalTrials.gov NCT01996423). [ABSTRACT FROM AUTHOR]

Promising initial studies on vitamin D (VD) supplementation as an adjunct treatment for major depressive disorder (MDD) require rigorously designed randomized controlled trials (RCTs). We aim to investigate the effects of augmenting standard MDD treatment with VD supplementation and examine factors influencing the treatment outcome. This article describes the study design, measures, and baseline characteristics. This multicenter RCT compares the efficacy of a six‐month VD intervention at 100 micrograms/day versus 10 micrograms/day (μg/day) (4000 IU (international units)/day vs. 400 IU/day) added to a standard treatment in outpatients aged 20–61 years with MDD. The primary outcome is change in the Montgomery–Åsberg Depression Rating Scale (MADRS) score. Secondary outcomes are other indicators of mental health and functionality (BDI, SOC, 15‐D, PSS10, LS‐4, LOT‐R, YSQ‐S2‐extended, CORE‐OM, TAS‐20, BRCS, TADS, SCL‐90, DIAD, GAF), and circulating biomarkers. Intervention assessments are conducted at baseline, 3, and 6 months, and follow‐ups at 18 months and 6 years post‐baseline. The baseline sample had 319 subjects (74% women; median age 31 (inter‐quartile range (IQR) 15), mean MADRS score 21.38 (SD 6.04)), with 281 assigned to the RCT. At present, the study continues as a follow‐up study. DepFuD project will provide extensive information regarding the potential benefits of VD and enables to identify various biopsychosocial depression‐associated risk factors. [ABSTRACT FROM AUTHOR]

Aim Materials and Methods Results Conclusion The etiology of telogen effluvium (TE) includes situations that may cause physiological stress, surgical trauma, inflammatory, infectious, iatrogenic causes, medications and nutritional deficiencies. TE has been associated with iron deficiency, vitamin B12 deficiency and thyroid diseases. In recent years, the use of over‐the‐counter food supplements containing vitamins and minerals such as biotin, vitamin D, zinc (Zn), copper (Cu) and selenium (Se) has been increasing in TE patients. The aim of this study is to investigate whether there are differences in nutritional status, vitamin and mineral levels by comparing individuals with TE and a control group.This case–control study included 90 female patients diagnosed with chronic telogen effluvium (CTE), and 90 female controls volunteered to participate in the study who consulted for reasons other than TE. Both groups aged 18 and over and applied to dermatology polyclinic between 01.09.2022 and 01.09.2023. A detailed anamnesis was taken from all patients, a hair pull test was performed, and TE was diagnosed after a dermoscopic examination was performed on all areas of the scalp. Then, serum vitamin D, Zn, Cu, Se levels and biotin levels in serum and urine were measured. Hemoglobin (Hb), ferritin, vitamin B12 and thyroid function tests were retrospectively scanned from the hospital database.It was determined that Zn levels were significantly lower in CTE patients than in controls. Se levels were found to be significantly higher in patients than in controls. There was no difference in Hb, ferritin, vitamin B12, thyroid function tests, vitamin D, Cu levels, serum and urine biotin levels between the two groups. Zn, Cu/Zn and Se levels were found to have statistically significant diagnostic performance in predicting the diagnosis of CTE. Cu/Zn ratio and Se value were found to be significant predictors of CTE.This study shows us that nutritional deficiencies are not as common as thought in patients diagnosed with TE. Other causes that may cause TE should be investigated by a detailed anamnesis and a good physical examination. After all, tests for suspected conditions should be performed and individualized treatment options should be created for each patient. [ABSTRACT FROM AUTHOR]

Background: Given the growing popularity of plant‐based diets, this study investigated the dietary habits and self‐reported health outcomes of health‐conscious adults consuming plant‐based diets. Methods: A cross‐sectional online survey (n = 315) was distributed to members of Plant‐Based Health Professionals UK, a community interest company. Dietary intake was assessed through a food frequency questionnaire. Data were summarised descriptively. Dietary habits among respondents following a whole food plant‐based (WFPB) and vegan diet were compared using hypothesis tests. Results: Respondents reported following a WFPB (61%), vegan (28%) and semi plant‐based (11%) diet. Median time on current dietary pattern was 5 years. Daily or more frequent consumption was reported for the following foods: fruits 77%, berries 51%, green vegetables 48%, cruciferous vegetables 45%, other vegetables 64%, beans/legumes 41%, whole grains 62%, nuts and all seeds 63%. Consumption of ultra‐processed foods and plant‐based meat alternatives was low. About 93% of those on a WFPB or vegan diet supplemented with vitamin B12 and 61% with vitamin D. The median body mass index was 22.4 kg/m2. Fifty per cent of participants reported weight loss after adopting a plant‐based diet, with a median loss of 6.4 kg. Thirty‐five per cent reported reversing or improving an underlying health condition, and 15% were able to stop or reduce prescribed medication use as a result of dietary changes. Conclusions: This study suggests that a well‐planned plant‐based diet is achievable and sustainable in a community setting and can be associated with health benefits. How to best encourage such sustainable diets among the broad population requires further research. Key points: Dietary intakes were consistent with a high‐quality diet, with a variety of whole plant foods consumed and minimal ultraprocessed foods, refined grains, sugar‐sweetened beverages and meat alternatives.Whole food plant‐based (WFPB) participants followed, on average, healthier diets than vegan participants and engaged in more physical activity.In this plant‐based population, there were indicators of favourable health outcomes such as low body mass index (BMI) and low levels of common chronic conditions.Participants reported improvements in a range of health conditions and a reduction in medication as a result of adopting plant‐based diets, with some requiring further research.This study suggests that a well‐planned plant‐based diet is achievable and sustainable in a community setting and can be associated with health benefits. [ABSTRACT FROM AUTHOR]

Behaviours designated as basking span a broad array of ectothermic and endothermic animals. Understanding the role that basking plays in thermal biology is important because maintaining body temperatures within certain limits is essential to survival, growth and reproduction, and may affect responses to climate change. In the case of turtles and tortoises, behaviours designated as basking may occur out of water, at the surface of a water body or deep in a water body, during the day or at night, and with or without exposure to solar radiation or another heat source. On the available evidence, the primary function of most nominal chelonian basking is thermoregulatory warming, which provides numerous benefits including expediting gonadal recrudescence, enhancing foraging, feeding, digestion and growth, and amelioration of infectious disease and endoparasitism. Substantial evidence supports conditioning of the skin and shell as a common additional function of chelonian basking. Other functions of nominal chelonian basking with some supporting evidence for particular species and environments are thermoregulatory cooling, leech removal, vitamin D synthesis and osmotic control. Nominal chelonian basking may sometimes be undertaken for resting or avoiding aggression, but supporting evidence is scant. The only uniting feature of all chelonian behaviours designated as basking is quiescence, but not all quiescent chelonian behaviours are labelled as basking. Consequently, the general meaning of chelonian basking is indeterminate. Avoiding ambiguity requires the provision of explicit criteria by which basking can be distinguished from other quiescent behaviours, and the attachment of qualifiers that specify the applicable time of day, medium and environmental exposure. [ABSTRACT FROM AUTHOR]

Aim Methods Results Conclusion Vitamin D (VD) affects skeletal muscles. The high prevalence of VD deficiency in Japan may lead to decreased skeletal muscle mass and strength, increasing the prevalence of sarcopenia. Therefore, we aimed to investigate the association between serum VD levels and skeletal muscle indices in a Japanese community‐dwelling older population.We extracted data from the Septuagenarians, Octogenarians, Nonagenarians Investigation with Centenarians (SONIC) study. We analyzed the data for participants in the 70s and 90s age groups. Skeletal mass index (SMI) using bioimpedance analysis, grip strength, walking speed, and serum VD levels using 25‐hydroxyvitamin D [25(OH)D] were measured.We analyzed the data of 310 participants in their 70s and 48 in their 90s. Mean serum 25(OH)D levels were 21.6 ± 5.0 ng/mL in the 70s group and 23.4 ± 9.1 ng/mL in the 90s group. In the 70s group, serum 25(OH)D levels correlated with SMI (r = 0.21, P < 0.0001) and grip strength (r = 0.30, P < 0.0001). Serum 25(OH)D levels were independently associated with SMI after adjusting for sex, body mass index, and serum albumin levels. In the 90s group, serum 25(OH)D levels were correlated with SMI (r = 0.29, P = 0.049) and grip strength (r = 0.34, P = 0.018). However, the multivariate analysis showed no independent association between SMI, grip strength, and serum 25(OH)D levels.In a cross‐sectional analysis of an older population, serum VD levels were associated with SMI and grip strength, and this association was more pronounced in the 70s group than in the 90s group. Our results suggest that serum VD levels maintain skeletal muscle mass and grip strength. Geriatr Gerontol Int 2024; ••: ••–••. [ABSTRACT FROM AUTHOR]

Background Objectives Animals Methods Results Conclusion and Clinical Importance In inflammatory bowel disease (IBD) of humans, nutrient malabsorption can result in fat‐soluble vitamin deficiency, especially of vitamin D. In veterinary species, decreased concentrations of vitamin D are relatively common in dogs with chronic enteropathy (CE), but data on the status of other fat‐soluble vitamins (FSVs) is lacking.Determine the serum concentrations of retinol, vitamin D, and α‐tocopherol in dogs with CE compared with healthy dogs and compare clinical, clinicopathologic variables between CE and healthy dogs to detect associations with decreased FSVs concentrations.Eighteen client‐owned dogs with CE and 33 healthy dogs.Serum 25‐hydroxyvitamin D (25[OH]D), serum retinol and α‐tocopherol concentrations were compared between groups. Correlations and multiple regression modeling were used to examine the relationship between serum 25(OH)D, retinol, and α‐tocopherol concentrations and clinical and clinicopathological variables.Dogs with low serum albumin concentrations were more likely to have lower 25(OH)D concentrations than dogs with normal serum albumin concentration. Dogs with CE had higher serum concentrations of retinol, and variable α‐tocopherol concentrations. The cause of these dysregulated vitamin concentrations is unclear and requires further study.Dogs with severe forms of CE should be monitored for decreased concentrations of 25(OH)D. Additional studies are needed to evaluate the clinical relevance and the possible benefit of vitamin D supplementation in these patients. [ABSTRACT FROM AUTHOR]

Key Clinical Message: This case report describes a 52‐year‐old patient presenting with recurrent episodes of pancreatitis and renal stones. Further investigation revealed hypocalcemia and elevated parathyroid hormone (PTH) levels, leading to diagnosis of a parathyroid adenoma. This case highlights the importance of considering primary hyperparathyroidism in patients with recurrent pancreatitis and renal stones, as early diagnosis and surgical intervention can prevent recurrence and reduce morbidity. Primary Hyperparathyroidism secondary to Parathyroid adenoma, rarely presents as acute pancreatitis. A 38‐year‐young male with a history of recurrent renal stones referred from a local center, presented to the emergency services, with a diagnosis of acute pancreatitis and bilateral renal stones. Laboratory evaluation showed an elevated calcium level, elevated PTH levels, low vitamin D, and low phosphorus levels. CT scan done outside was suggestive of acute pancreatitis along with bilateral renal calculi. USG neck and MIBI scan done as a part of hypercalcemia evaluation showed presence of a right parathyroid adenoma. Parathyroid adenoma was later removed, and calcium and parathyroid levels were normal on subsequent follow ups. [ABSTRACT FROM AUTHOR]

This study aimed to evaluate the impact of dietary boron on osteoporosis in postmenopausal Jordanian women. Sixty‐six women diagnosed with osteoporosis were recruited and data on personal information, dietary habits, medical history, and lifestyle were collected. Bone mineral density, serum calcium, and serum vitamin D measurements were obtained from patient records. This study showed a strong correlation between boron intake and bone mineral density in these women with osteoporosis and a negative correlation between boron intake and serum calcium (p <.05). However, no significant correlation was found between boron intake and various parameters such as serum vitamin D, dietary habits, body mass index (BMI), waist circumference (WC), age of menopause, cases of hysterectomy or oophorectomy, location of fractures, education level, social status, smoking, and physical activity (p >.05). A significant link was found between boron intake and bone mineral density highlighting the importance of nutritional and lifestyle factors affecting bone health. Further research on the specific impact of boron is warranted to better inform dietary interventions for osteoporosis prevention and management. [ABSTRACT FROM AUTHOR]

Background: The clinical strategy of oral supplementation of Vitamin D (VD) as a preventive and therapeutic measure for warts needs further exploration. Methods: The clinical data of patients with skin diseases who visited the Children's Hospital affiliated with Chongqing Medical University from February 2018 to June 2024 were collected. The serum VD levels in patients with warts (common warts, flat warts, and plantar warts) and patients with other common skin diseases (atopic dermatitis, psoriasis, alopecia areata, vitiligo, and chronic urticaria) were compared. Two‐sample bidirectional Mendelian randomization (MR) analysis was performed to investigate potential causal associations between VD and warts. Results: The average serum VD level of children with warts was 23.27 ± 7.07 ng/mL, which showed no statistically significant difference compared to children with other common skin diseases. The inverse variance weighted (IVW) method analysis indicated a positive causal relationship between VD and warts (Odds Ratio [OR] = 1.86, [95% CI: 1.19−2.92], p = 0.007). Sensitivity analysis did not show any indication of horizontal pleiotropy or heterogeneity. The MR‐PRESSO method did not identify any outliers. Conclusion: The levels of serum VD in children with warts do not significantly decrease compared to children with other common skin conditions. The evidence from the MR analysis indicates a positive causal relationship between VD and warts, suggesting caution in supplementing VD for children with warts who have normal or elevated serum VD levels. Further clinical studies are needed for validation in the future. [ABSTRACT FROM AUTHOR]

A study published in the Clinical & Experimental Allergy journal found that low levels of vitamin D in early childhood were associated with aeroallergen-specific IgE in children with a history of severe bronchiolitis. However, there was no association between vitamin D levels and total, food-specific, or outdoor-aeroallergen-specific IgE. The study suggests that vitamin D plays a role in immune modulation and may be involved in allergic diseases. The study had limitations, such as a small sample size and not accounting for geographic factors and individual allergen exposure. Further research is needed to fully understand the relationship between vitamin D and allergic sensitization. [Extracted from the article]

Introduction: Cardiovascular and noncardiovascular comorbidities have been recognized as predictors of clinical response in patients receiving cardiac resynchronization therapy (CRT). However, data on vitamin D as a predictor of CRT response are conflicting. Method: We identified studies from MEDLINE and Embase databases, searching from inception to May 2024, to investigate the association between 25‐OH vitamin D levels before CRT implantation and outcomes. Studies had to report 25‐OH vitamin D levels or the proportion of patients with vitamin D insufficiency and categorize outcomes as CRT responders or nonresponders. We extracted mean 25‐OH vitamin D and standard deviations for both groups from each study and calculated the pooled mean difference (MD). We also retrieved risk ratios, and 95% confidence intervals (CIs) for the association between vitamin D insufficiency and lack of CRT response, combining them using the generic inverse variance method. Results: Our meta‐analysis included four studies. CRT responders had higher levels of 25‐OH vitamin D than nonresponders, with a pooled MD of 8.04 ng/mL (95% CI: 3.16–12.93; I2 = 48%, p <.001). Patients with vitamin D insufficiency before implantation had higher odds of lacking response to CRT, with a pooled RR of 3.28 (95% CI: 1.43–7.50; I2 = 0%, p =.005) compared to those with normal vitamin D. Conclusions: CRT responders had higher 25‐OH vitamin D levels compared to nonresponders. Vitamin D insufficiency was associated with a higher risk of nonresponse to CRT. These findings highlight the importance of monitoring and managing vitamin D levels in these patients. [ABSTRACT FROM AUTHOR]

Introduction: Several calcimimetics, other than cinacalcet, are commercially available; however, their effects on calcium and phosphate levels have not yet been fully studied. We conducted a systematic review and meta‐analysis of randomized controlled trials to evaluate the impact of calcimimetics on the management of serum calcium and phosphate levels in patients with secondary hyperparathyroidism undergoing dialysis. Methods: A systematic literature search through October 2023 and a meta‐analysis were conducted on the effects of upacicalcet, etelcalcetide, evocalcet, and cinacalcet on serum calcium and phosphate levels in patients with secondary hyperparathyroidism undergoing dialysis; we searched PubMed, Ovid MEDLINE, and the Cochrane Central Register of Controlled Trials, and 21 studies comprising 6371 patients undergoing dialysis were included. Results: Participants treated with calcimimetics had lower serum calcium and phosphate levels than placebo. Conclusion: Calcimimetics significantly reduced serum calcium and phosphate levels compared to placebo in patients with secondary hyperparathyroidism undergoing dialysis, independent of therapeutic strategy or concomitant vitamin D treatment. [ABSTRACT FROM AUTHOR]

Introduction: Vaccination is the effective strategy for coronavirus disease 2019 (COVID‐19). However, few studies have investigated the association between severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) immunoglobulin (Ig)G and vitamin D. Methods: This study aimed to investigate the association between SARS‐CoV‐2 IgG and active vitamin D analogs in hemodialysis patients. Blood samples were collected four times: before vaccination and 30, 60, and 90 days after vaccination, BNT162b2 (Pfizer©). Results: A total of 418 patients were enrolled. The mean age was 71.1 ± 12 years. Almost two thirds of the patients were prescribed active vitamin D analogs. The distribution of SARS‐CoV‐2 IgG before vaccination was 235 (93–454) AU/mL. After multiple regression analyses, active vitamin D analog use was found to be associated with higher SARS‐CoV‐2 IgG levels from prevaccination to 90 days postvaccination. Conclusion: This study demonstrated an association between higher SARS‐CoV‐2 IgG and active vitamin D analog use in hemodialysis patients. Clinical trial registration: The study information was registered in the UMIN‐CTR (UMIN 000046906). [ABSTRACT FROM AUTHOR]

Objective of the study was to find the association of vitamin D receptor (VDR) polymorphisms (Fokl, Taql and Apal) with vitamin D levels in diabetic foot ulcer (DFU) patients in South India. In this case–control study, plasma vitamin D levels and VDR genotype frequencies of 70 cases (DFU patients) were compared with 70 diabetic (diabetes mellitus [DM] [non‐DFU]) patients and 70 apparently healthy controls (HC) from South India. Plasma vitamin D levels were measured using the ELISA technique, and genotyping of VDR polymorphisms was carried out using real‐time polymerase chain reaction. Logistic regression was used to find the association between DFU versus HC and DFU versus DM traits. Association analysis was performed based on additive, dominant and recessive models with age and gender as covariates. A 45.7% of DFU patients have sufficient vitamin D levels than 48.6% and 40% of DM patients and HC, respectively. Linkage disequilibrium analysis for DFU versus HC and DFU versus DM traits shows that single nucleotide polymorphisms (SNPs) Taq1 (rs731236) and Apal (rs7975232) are in strong linkage disequilibrium in DFU patients. The alleles and genotype frequencies were similar in all three groups. Although the additive model does not show statistical significance, age and sex correlate with the three SNPs (Fokl, Taql and Apal). No association was found between VDR gene polymorphisms and vitamin D levels in DFU patients in Southern India. On the other hand, age and sex correlate with the three SNPs. [ABSTRACT FROM AUTHOR]

Background and Aims: Vitamin D deficiency impacts a significant proportion of the world's population, and this deficiency has been linked to various conditions characterized by imbalanced serotonin regulation. The objective of this systematic review and meta‐analysis was to evaluate the effect of vitamin D supplementation on serum serotonin levels. Methods: We conducted a comprehensive search of PubMed, Scopus, Cochrane Central for Randomized Clinical Trials, and Web of Science up to September 2022, without any language restrictions. The effect sizes were calculated using the standard mean difference (SMD) and 95% confidence interval (CI). Results: Six randomized clinical trials involving 356 participants were included in the analysis. Our findings indicated no significant changes in serotonin levels between the intervention and control groups (SMD: 0.24 ng/mL, 95% CI: −0.28, 0.75, p > 0.10). Subgroup analysis also did not reveal any significant changes in serotonin levels among children, participants with autism spectrum disorders, interventions lasting 10 weeks or longer, or those receiving vitamin D doses below 4000 IU/day. Conclusion: Although the results obtained in this systematic review are inconclusive, they support the need for further well‐designed randomized trials to assess the potential role of vitamin D supplementation in regulating serotonin levels and potentially ameliorating depression and related disorders. [ABSTRACT FROM AUTHOR]

Aim Methods Results Conclusion This study evaluated the effectiveness of high‐dose vitamin D supplementation in alleviating fatigue and neuropsychiatric symptoms in post‐COVID syndrome.In an 8‐week, double‐blind, randomized, placebo‐controlled trial, 80 patients with post‐COVID fatigue or neuropsychiatric symptoms were enrolled. Participants were randomly assigned to receive either 60,000 IU of vitamin D weekly (n = 40) or a placebo (n = 40) for 8 weeks. Clinical outcomes were assessed using the 11‐item Chalder Fatigue Scale (CFQ‐11); 21‐item Depression, Anxiety, and Stress Scale (DASS‐21); Pittsburgh Sleep Quality Index (PSQI); Addenbrooke's Cognitive Examination III (ACE); and Trail Making Test A and B (TMT‐A and TMT‐B). Baseline and 8‐week measurements of inflammatory markers, including interleukin 6 (IL‐6) and C‐reactive protein (CRP), were also collected.Significant improvements were found in the vitamin D group for CFQ (coefficient −3.5, P = 0.024), DASS‐anxiety (−2.0, P = 0.011), and ACE (2.1, P = 0.012). No significant differences were observed in PSQI, DASS‐depression, TMT, IL‐6, or CRP levels. The incidence of adverse events was comparable between groups, with no serious adverse events reported.High‐dose vitamin D supplementation may benefit patients with post‐COVID syndrome by reducing fatigue, alleviating anxiety, and improving cognitive symptoms, with minimal side effects. [ABSTRACT FROM AUTHOR]

Background Methods Results Conclusions Acne vulgaris is a very common inflammatory skin disease that significantly impacts the quality of life of affected individuals. Previous studies have indicated that individuals with acne vulgaris often have low levels of zinc, selenium, and vitamin D. However, these three nutrients have rarely been collectively examined in a single study. The objective of this study was to compare serum levels of zinc, selenium, and vitamin D in patients with acne vulgaris in comparison to a control group.This case–control study included 100 adult patients with acne vulgaris attending a dermatology clinic, in 2020. A group of 100 patients without acne vulgaris attending the same clinics were evaluated as controls. Participants' sociodemographic characteristics, including age, sex, occupation, alcohol consumption, and tobacco smoking were recorded. In addition, anthropometric indices, such as weight and height, were measured and the body mass index (BMI) was calculated accordingly. Acne severity was determined using Tutakne and Chari's grading system. Serum zinc, selenium, and vitamin D levels were evaluated in peripheral blood samples of all the participants.Acne patients and controls were comparable regarding age, sex, weight, height, BMI, occupation, alcohol consumption, and tobacco smoking (p > 0.05). Serum zinc, selenium, and vitamin D levels were all significantly lower in acne patients than in controls (p < 0.001). Furthermore, the frequency of abnormal zinc and vitamin D levels was significantly higher in acne patients (p = 0.002 and p = 0.001, respectively), but there was no significant difference between the two groups regarding abnormal serum selenium levels (p = 0.228). Also, serum zinc, selenium, and vitamin D levels lower levels in patients with grade 4 acne compared to other disease severity grades (p < 0.001).Patients with acne vulgaris have lower levels of serum zinc, selenium, and vitamin D compared to the control group. Additionally, there is a correlation between the severity of the disease and lower levels of these nutrients. [ABSTRACT FROM AUTHOR]

Background: Androgen deprivation therapy (ADT) inhibits prostate cancer growth. However, ADT causes loss of bone mineral density (BMD) and an increase in fracture risk; effective interventions for ADT‐induced bone loss are limited. Methods: A phase 2 randomized controlled trial investigated the feasibility, safety, and preliminary efficacy of high‐dose weekly vitamin D (HDVD, 50,000 IU/week) versus placebo for 24 weeks in patients with prostate cancer receiving ADT, with all subjects receiving 600 IU/day vitamin D and 1000 mg/day calcium. Participants were ≥60 years (mean years, 67.7), had a serum 25‐hydroxyvitamin D level <32 ng/mL, and initiated ADT within the previous 6 months. At baseline and after intervention, dual‐energy x‐ray absorptiometry was used to assess BMD, and levels of bone cell, bone formation, and resorption were measured. Results: The HDVD group (N = 29) lost 1.5% BMD at the total hip vs. 4.1% for the low‐dose group (N = 30; p =.03) and 1.7% BMD at the femoral neck vs. 4.4% in the low‐dose group (p =.06). Stratified analyses showed that, for those with baseline 25‐hydroxyvitamin D level <27 ng/mL, the HDVD group lost 2.3% BMD at the total hip vs 7.1% for the low‐dose group (p <.01). Those in the HDVD arm showed significant changes in parathyroid hormone (p <.01), osteoprotegerin (p < 0.01), N‐terminal telopeptide of type 1 collagen (p < 0.01) and C‐terminal telopeptide of type 1 collagen (p < 0.01). No difference in adverse events or toxicity was noted between the groups. Conclusions: HDVD supplementation significantly reduced hip and femoral neck BMD loss, especially for patients with low baseline serum 25‐hydroxyvitamin D levels, although demonstrating safety and feasibility in prostate cancer patients on ADT. Patients with prostate cancer on androgen deprivation therapy often suffer rapid bone loss during the initiation of treatment. Supplementation with high‐dose vitamin D (50,000 IU/week plus 800 IU/day) significantly and safely decreased the amount of bone loss compared with vitamin D supplementation using the recommended daily allowance (800 IU/day). [ABSTRACT FROM AUTHOR]

Delayed conceiving is a failure of a female to attain clinical pregnancy within a year without the use of contraception or any precautionary measure. The females of reproductive age (20–49 years) are the sufferers, that is, about 1.5 million or 10% of couples globally are facing this issue. Delayed conception can be caused by several reasons including diet, lifestyle, and genetic and clinical problems. Deficiencies or overconsumption of any nutrient may also cause delayed conception in females. Dietary deficits such as iron, iodine, zinc, folate, and vitamin D reduce the ovarian reserve. Heavy metals such as copper, manganese, lead, and cadmium also have an impact on fertility. Overconsumption of fast foods and nonhome‐made foods increases the likelihood of infertility by 2–3. Smoking, physical activity, age, polycystic ovary syndrome (PCOS), obesity, and depression have all been considered lifestyle and clinical factors. If women have a sedentary lifestyle, too much exercise or obesity both contribute to infertility. In clinical factors, type 1 diabetes, insulin resistance, and hypertension mainly cause infertility. Our focus in this review is on the studies probe that how these variables contributed to delayed conception and how it can be controlled to help combat infertility. Prevention from delayed conception involves consuming a healthy and balanced diet that contains essential nutrients engaging in physical activity and abstaining from smoking, PCOS, and medical issues. [ABSTRACT FROM AUTHOR]

Background and purpose Experimental approach Key results Conclusion and implications Castration‐resistant prostate cancer (CRPC) is a common male malignancy that requires new therapeutic strategies due to acquired resistance to its first‐line treatment, docetaxel. The benefits of vitamin D on prostate cancer (PCa) progression have been previously reported. This study aimed to investigate the effects of vitamin D on chemoresistance in CRPC.Structure function relationships of potent vitamin D analogues were determined. The combination of the most potent analogue and docetaxel was explored in chemoresistant primary PCa spheroids and in a xenograft mouse model derived from a patient with a chemoresistant CRPC.Here, we show that Xe4MeCF3 is more potent than the natural ligand to induce vitamin D receptor (VDR) transcriptional activities and that it has a larger therapeutic window. Moreover, we demonstrate that VDR agonists restore docetaxel sensitivity in PCa spheroids. Importantly, Xe4MeCF3 reduces tumour growth in a chemoresistant CRPC patient‐derived xenograft. In addition, this treatment targets signalling pathways associated with cancer progression in the remaining cells.Taken together, these results unravel the potency of VDR agonists to overcome chemoresistance in CRPC and open new avenues for the clinical management of PCa. [ABSTRACT FROM AUTHOR]

Aim Methods Results Conclusion Extremely premature infants receive nutrition and medication through nasogastric tubes. Breastmilk given accordingly is subject to fat loss. This study aimed to investigate whether this could also apply to vitamin D.A questionnaire investigated vitamin D administration at a level III neonatal intensive care unit in Sweden in 2021. Feeding simulations with breastmilk and various vitamin D mixtures were done accordingly. After administration, vitamin D3 concentration was analysed using chromatography with mass spectrometry, followed by repeated simulations with vitamin D mixtures without breastmilk in 2023.The questionnaire was completed by 10 persons. Vitamin D was administered as drops using an enteral syringe and a nasogastric tube in conjunction with a breastmilk meal. In the feeding simulations, vitamin D3 concentration after administration was significantly higher using a syringe alone compared to standard administration. When vitamins were administered according to standard but without breastmilk, 100% of the vitamin D and 40% of the multivitamins were lost. The vitamins adhered to the material, mainly in the nasogastric tube.Our findings indicate that standard vitamin D supplementation in the neonatal intensive care unit may be unpredictable when administered by enteral syringe and nasogastric tube. We suggest using direct oral administration whenever possible. [ABSTRACT FROM AUTHOR]

Issue Addressed: While the links between sun exposure and skin cancer are well known, the benefits of sun exposure, particularly as a source of vitamin D, are less well known. This paper reports on a deliberative study exploring public perspectives about sun exposure harms and benefits. Methods: Two citizens' juries were conducted in Brisbane and Adelaide to consider questions about sun exposure, vitamin D and health promotion. Members of the general population (jurors) listened to evidence from expert witnesses about the harms and benefits of sun exposure. Most witness sessions extended for 60 min, with 6 sessions over 2 days. At each citizens' jury, jurors were asked to listen to expert testimony, consider the evidence and make policy recommendations. The planning and design of the citizens' juries were informed by well‐established citizens' jury methods. Results: Jurors proposed that Australia needs improved public information about the harms and benefits of sun exposure. They argued for information that supports personal decision‐making that accounts for differences in skin tone and geographical region. Jurors agreed that Australia needs an updated sun safety campaign that reflects new research and addresses diversity. A one‐size‐fits‐all approach to sun protection may no longer be appropriate. Conclusions: While a new campaign should address both harms and benefits, jurors felt the need for skin cancer prevention outweighs the desirability of generating vitamin D through sun exposure. More nuanced public health messages are needed, which balance the need for skin protection and vitamin D, and acknowledge the diversity of Australia's population. So What?: Previous research studies are typically siloed into the separate areas of vitamin D or skin cancer research. This study incorporated both topics and pooled the views of participants in two citizens' juries who agreed on the need for improved information about the harms and benefits of sun exposure to reflect a modern Australian population. [ABSTRACT FROM AUTHOR]

Aim: The role of fetal vitamin D [25‐hydroxyvitamin D (25(OH)D)], one of the nuclear steroid transcription regulators, and brain development is unclear. We previously found a weak but persistent association between cord blood 25(OH)D and child language abilities at 18 months and 4 years of age, but no association with cognition or behaviour. The aim of this study was to investigate the association between cord blood 25(OH)D and a range of neurodevelopmental outcomes in these same children at 7 years of age. Methods: Cord blood samples from 250 Australian mother–child pairs were analysed for 25(OH)D by mass spectroscopy. Children underwent tests of cognition, language, academic abilities and executive functions with a trained assessor at 7 years of age. Caregivers completed questionnaires to rate their child's behaviour and executive functioning in the home environment. Associations between standardised 25(OH)D and outcomes were assessed using regression models, taking into account possible social and demographic confounders. Results: Standardised 25(OH)D in cord blood was not associated with any test or parent‐rated scores. Nor was there any association with the risk of having a poor test or parent‐rated score. Likewise, cord blood 25(OH)D categorised as <25, 25–50 and >50 nmol/L was not associated with test scores or parent‐rated scores. Conclusions: There was no evidence that cord blood vitamin D concentration or deficiency was associated with cognition, language, academic abilities, executive functioning or behaviour at 7 years of age. [ABSTRACT FROM AUTHOR]

Background: Calcitriol, the active form of vitamin D (also known as 1,25‐dihydroxycholecalciferol), improves the phenotype and increases frataxin levels in cell models of Friedreich ataxia (FRDA). Objectives: Based on these results, we aimed measuring the effects of a calcitriol dose of 0.25 mcg/24h in the neurological function and frataxin levels when administered to FRDA patients for a year. Methods: 20 FRDA patients where recluted and 15 patients completed the treatment for a year. Evaluations of neurological function changes (SARA scale, 9‐HPT, 8‐MWT, PATA test) and quality of life (Barthel Scale and Short Form (36) Health Survey [SF‐36] quality of life questionnaire) were performed. Frataxin amounts were measured in isolated platelets obtained from these FRDA patients, from heterozygous FRDA carriers (relatives of the FA patients) and from non‐heterozygous sex and age matched controls. Results: Although the patients did not experience any observable neurological improvement, there was a statistically significant increase in frataxin levels from initial values, 5.5 to 7.0 pg/μg after 12 months. Differences in frataxin levels referred to total protein levels were observed among sex‐ and age‐matched controls (18.1 pg/μg), relative controls (10.1 pg/μg), and FRDA patients (5.7 pg/μg). The treatment was well tolerated by most patients, and only some of them experienced minor adverse effects at the beginning of the trial. Conclusions: Calcitriol dosage used (0.25 mcg/24 h) is safe for FRDA patients, and it increases frataxin levels. We cannot rule out that higher doses administered longer could yield neurological benefits. © 2024 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society. [ABSTRACT FROM AUTHOR]

Aims/Introduction: Research has suggested that vitamin D deficiency is associated with diabetic retinopathy (DR). Our study aimed to determine whether vitamin D deficiency is the cause of diabetic retinopathy or if diabetic retinopathy reduces vitamin D levels. Materials and Methods: Participants with type‐2 diabetes were recruited for this prospective observational clinical study and were divided into a diabetic group without retinopathy and a diabetic group with retinopathy, with additional healthy volunteers serving as a control group. The differences in clinical characteristics among the three groups were also compared. Patients without retinopathy were then followed for 1 year to monitor the incidence of diabetic retinopathy. After follow‐up, participants were divided into subgroups based on whether diabetic retinopathy occurred. The baseline data of the subgroups were compared, and the independent risk factors were analyzed. Results: Vitamin D levels were generally low. Participants with diabetic retinopathy had significantly lower vitamin D levels than did those without retinopathy (P < 0.01). A comparison of the two subgroups revealed lower baseline vitamin D concentrations in the new‐DR subgroup than in the non‐DR subgroup (P < 0.01). Vitamin D deficiency and elevated HbA1c levels were found to be independent risk factors for diabetic retinopathy (OR = 0.935, 95% CI: 0.867–0.981, P = 0.006; OR = 2.208, 95% CI: 1.764–2.764, P < 0.01). The limit of vitamin D intake according to the receiver‐operating characteristic (ROC) curve was 26.01 ng/mL, and the area under the ROC curve was 0.603 (95% CI: 0.559–0.706, P = 0.002). Conclusions: Vitamin D levels were significantly lower in patients diagnosed with diabetic retinopathy. More importantly, vitamin D deficiency may accelerate the onset of diabetic retinopathy. [ABSTRACT FROM AUTHOR]

Background: Little information exists about vitamin D status in bitches with mammary tumors. Objectives: To determine whether low plasma vitamin D concentrations are found in bitches with mammary tumors. Animals: Eighty‐five client‐owned bitches with mammary tumors (n = 21 benign, n = 64 malignant) and 39 age‐matched healthy bitches. Methods: Case‐control study. Plasma ionized and total calcium, phosphorus, magnesium, urea, creatinine, albumin, total proteins, alanine aminotransferase, alkaline phosphatase, parathyroid hormone (PTH), calcitriol (1,25‐dihydroxyvitamin D), and 25‐hydroxyvitamin D concentrations were measured in all bitches at the time of clinical diagnosis and before any treatments. Statistical analysis was performed to compare variables among groups (control, benign, and malignant). Results: No significant differences were found when plasma 25‐hydroxyvitamin D concentrations in bitches with malignant (148.9 [59.9] ng/mL) and benign mammary tumors (150.1 [122.3] ng/mL) were compared with control group (129.9 [54.5] ng/mL). Parathyroid hormone was significantly higher in bitches with malignant (19.9 [20.5] pg/mL), and benign mammary tumors (14.6 [14.9] pg/mL) compared with control group (7.5 [7.5] pg/mL; P <.01). Only the presence of mammary tumors (P <.01) and age (P =.04; adjusted R2 =.22) was significant in predicting PTH. Conclusions: Bitches with mammary tumors do not have low 25‐hydroxyvitamin D concentrations thus vitamin D supplementation is unlikely to be useful for prevention of mammary tumors in bitches. [ABSTRACT FROM AUTHOR]

Introduction: Post‐surgical hypoparathyroidism often occurs after total thyroidectomy (TT). The aim of this study is to investigate whether the use of near‐infrared autofluorescence (NIRAF) of parathyroid glands (PGs) can aid experienced surgeons in identifying more PGs during surgery, potentially reducing unintended resection, and assessing its impact on post‐surgical hypoparathyroidism. Materials and Methods: All patients undergoing at least a TT by two experienced surgeons, between 2020 and 2021, were enrolled and randomized into two cohorts: NIRAF group (NG) and CONTROL group (CG). Transient hypoparathyroidism was defined by serum concentration of PTH<12 ng/mL at the 1st post‐operative day and permanent by the need of calcium‐active vitamin D treatment >6 months from the surgery with still undetectable PTH or <12 ng/m. Results: Among 236 patients (111 in NG, 125 in CG), the number of PGs identified was higher in NG (93.9%, 417/444) compared to CG (81.4%, 407/500) (p < 0.001), with a mean of 3.76 ± 0.44 PGs per patient in NG and 3.25 ± 0.79 in CG. The number of unintendedly resected PGs was 14 in NG and 42 in CG (p < 0.0001). Transient hypoparathyroidism was observed in 18 patients (16.2%) in NG and 40 patients (32.0%) in CG (p = 0.004). Permanent hypoparathyroidism affected 1 patient in NG and 7 patients in CG (p = 0.06). The mean operative time was longer in NG (104.3 ± 32.08 min) compared to CG (85.5 ± 40.62 min) (p < 0.001). Conclusions: NIRAF enhances the identification of PGs, preventing their inadvertent resection and reducing the overall incidence of post‐surgical hypoparathyroidism. [ABSTRACT FROM AUTHOR]

Widely varying prevalence of vitamin D deficiency has been reported in patients presenting for total knee arthroplasty (TKA). The primary aim of this study was to determine vitamin D levels in TKA patients and to compare to patients already routinely evaluated for vitamin D levels, patients with fragility fractures of the distal radius (DRF). There is significant overlap between patients presenting for TKA and with DRF, both in terms of medical comorbidities and overall health status, making these populations suitable comparative cohorts. Wefound that all patients presenting for TKA consultation had vitamin D insufficiency and 33% had vitamin D deficiency, compared to only 37% and 14% in the DRF cohort, a patient population routinely evaluated for vitamin D due to the high risk of deficiency. Furthermore, patients with DRF had higher levels of vitamin D before (38 ± 16 vs. 23 ± 5) and after vitamin D supplementation (39 ± 17 vs. 33 ± 10), suggesting that patients presenting for TKA are at even higher risk of vitamin D insufficiency than patients presenting with DRF. Reassuringly, supplementation successfully corrected 39.0% and 55.8% of patients in the DRF and TKA cohorts, respectively. [ABSTRACT FROM AUTHOR]

Introduction: Sufficient levels of vitamin D have been associated with higher chances for both clinical pregnancy and live birth among women undergoing assisted reproductive techniques, whereas low levels of maternal vitamin D have been associated with preeclampsia and late miscarriage. In Denmark, subgroups at risk for low vitamin D levels, including neonates and toddlers, are recommended to use supplementation. The aim was to study the level of vitamin D3 among neonates born after in vitro fertilization compared with neonates from the general population. Material and methods: In this cohort study a random sample of 1326 neonates representing the general population and 1200 neonates conceived by in vitro fertilization born in Denmark from 1995 to 2002 were identified from registries covering the whole Danish population. Information on use of assisted reproduction was collected from the Danish In Vitro Fertilization register, ICD‐10 code: DZ358F. 25‐Hydroxyvitamin D was measured from dried blood spots routinely collected by heel prick 48–72 h after birth and corrected according to the hematocrit fraction for capillary blood of neonates. Linear regression analysis was performed, both crude and adjusted, for predefined putative confounders, identified through directed acyclic graphs. Results: Vitamin D3 analysis could be performed from a total of 1105 neonates from the general population and 1072 neonates conceived by in vitro fertilization that were subsequently included in the study. The median vitamin D3 was 24.0 nmol/L (interquartile range [IQR] 14.1–39.3) and 33.0 nmol/L (IQR 21.3–48.8) among neonates from the general population and neonates conceived by in vitro fertilization, respectively. The adjusted mean difference between neonates from the general population and those conceived by in vitro fertilization was 6.1 nmol/L (95% confidence interval 4.1–8.1). Conclusions: In this study, children born after in vitro fertilization have a higher vitamin D3 than a random sample of neonates in Denmark. [ABSTRACT FROM AUTHOR]

This systematic review and meta‐analysis aimed to consolidate evidence on dietary interventions for atopic eczema/dermatitis (AD) skin symptoms in children without food allergies, following PRISMA 2020 guidelines. Systematic review updates were conducted in May 2022 and June 2023, focusing on randomized placebo‐controlled trials (RCTs) involving children with AD but without food allergies. Specific diets or supplements, such as vitamins, minerals, probiotics, prebiotics, symbiotics, or postbiotics, were explored in these trials. Exclusions comprised descriptive studies, systematic reviews, meta‐analyses, letters, case reports, studies involving elimination diets, and those reporting on food allergens in children and adolescents. Additionally, studies assessing exacerbation of AD due to food allergy/sensitization and those evaluating elimination diets' effects on AD were excluded. Nutritional supplementation studies were eligible regardless of sensitization profile. Evaluation of their impact on AD clinical expression was performed using SCORAD scores, and a meta‐analysis of SCORAD outcomes was conducted using random‐effect models (CRD42022328702). The review encompassed 27 RCTs examining prebiotics, Vitamin D, evening primrose oil, and substituting cow's milk formula with partially hydrolyzed whey milk formula. A meta‐analysis of 20 RCTs assessing probiotics, alone or combined with prebiotics, revealed a significant reduction in SCORAD scores, suggesting a consistent trend in alleviating AD symptoms in children without food allergies. Nonetheless, evidence for other dietary interventions remains limited, underscoring the necessity for well‐designed intervention studies targeting multiple factors to understand etiological interactions and propose reliable manipulation strategies. [ABSTRACT FROM AUTHOR]

Thyroid cancer (TC) is one of the most common endocrine malignancies worldwide. Increasing evidence suggests that vitamin D (VD) has potential benefits in the treatment of TC. However, evidence regarding the targets and molecular mechanisms of VD in TC remains limited. In this study, we conducted network pharmacology, molecular docking, and experimental evaluation to explore the target genes, biological functions, and signaling pathways involved in this process. Network analysis revealed 77 potential target genes of VD against TC, and four hub target genes were identified: ESR1, KIT, CCND1, and PGR. Furthermore, we identified the biological processes (BP) and signaling pathways involving these potential target genes, and then determined the possible interaction between the hub targets and VD through molecular docking. Finally, through in vitro experiments, we found that VD effectively inhibits the proliferation of TC cells and downregulates the expression of the ESR1 gene. In conclusion, the effects of VD against TC involve multiple biological targets, BP, and signaling pathways. These findings provide scientific evidence for the application of VD in the treatment of TC. [ABSTRACT FROM AUTHOR]

Background: Rheumatoid arthritis (RA) is a chronic autoimmune disorder and its characteristics include the immune system's invasion of the healthy lining of the joints and the articular structures degeneration. The IL‐21 pro‐inflammatory cytokine, and the reactive oxygen species (ROS) might have a role in the RA etiopathogenesis. The present study assessed the correlation of IL‐21 with vitamin 25(OH)D and the ROS. Methods: The study included 120 RA patients and 60 healthy group. The RA patients were categorized based on rheumatoid factor (RF) seropositivity or seronegativity and the RA severity. Chemiluminescent immunoassay and 10% hematocrit were used to check levels of vitamin 25(OH)D and ROS, respectively. ELISA was used for the detection of IL‐21 in the plasma. Results: The RA patients had a significantly reduced vitamin 25(OH)D level compared to the healthy controls. The IL‐21 and ROS were however significantly increased in the RA patients compared to the controls. Further, the seropositive RF and the high RA severity patients had significant IL‐21 and ROS increase in comparison with the seronegative RF and the low severity RA patients. Finally, IL‐21 negatively correlated with vitamin 25(OH)D, but positively correlated with the ROS. Conclusion: This is the first investigation to confirm the relationship between IL‐21 with vitamin 25(OH)D and the ROS among the RA patients. The findings indicate that vitamin 25(OH)D is reduced in the RA patients' serum. ROS and IL‐21 are also associated with increased RA severity. [ABSTRACT FROM AUTHOR]

This article discusses the use of vitamin D as a potential treatment for warts. Warts are difficult to treat, and current treatment options are not always effective. Vitamin D has been shown to have immune therapeutic properties and can inhibit keratinocyte proliferation, which is a therapeutic goal in managing warts. Studies have demonstrated the beneficial effects of intralesional and topical vitamin D in treating resistant warts. However, the efficacy of vitamin D treatment can vary depending on the specific subtype of HPV involved and other factors such as dose and duration of treatment. Further research is needed to fully understand the potential of vitamin D in wart management. [Extracted from the article]

Objectives: This study aimed to examine the effects of supplementation of vitamin D to the egg‐yolk extender on characteristics of frozen–thawed ram semen. Methods: Semen samples obtained from adult rams were pooled and divided into five equal volumes. It was reconstituted with extenders containing different concentrations of vitamin D: 0 (control), 12.5 (VITD 12.5), 25 (VITD 25), 50 (VITD 50), and 100 ng/mL (VITD 100), and then they were frozen. Sperm motility parameters, plasma membrane functional integrity, acrosomal integrity, DNA fragmentation, and mitochondrial membrane potential of the groups were evaluated after sperm thawing. Results: Total motility and progressive motility were higher in VITD 50 than in all other groups (p < 0.05). Higher sperm straightness, linearity, and wooble were higher in VITD 50 than in the control group (p < 0.05). A similar pattern of VITD 50 was observed for plasma membrane integrity and mitochondrial membrane potential (p > 0.05). Conclusions: In the study, it was observed that adding vitamin D to the extender had a beneficial effect on ram spermatological parameters. In addition, it was concluded that the use of the 50 ng/mL vitamin D in the extender provided more effective protection than the other doses. [ABSTRACT FROM AUTHOR]

Aim: To investigate the association between vitamin D3 level and oxidative stress biomarkers such as Heat Shock Protein 70 (HSP70), ferric reducing ability of plasma (FRAP), advanced oxidation protein products (AOPP) and advanced glycation end products (AGEs) in patients with Type 2 diabetes. Method: In this cross‐sectional study, 54 patients including 32 females and 22 males with a mean age of 54.92 ± 11.37 years with T2D attending the diabetes clinic from 2021 to 2022 were included. According to the average level of vitamin D in this population (14.91), they were divided into two groups with vitamin D ≤15 ng/mL and vitamin D >15 ng/mL. Multivariate regression analysis was conducted to evaluate the relationship between vitamin D and AOPP, HSP and FRAP parameters. The correlation between vitamin D and other variables was evaluated via the Pearson correlation test. Result: Vitamin D level had a positive relation with FRAP (β = 0.32, p = 0.017) and HSP (β = 0.39, p = 0.003), but had a negative relation with AOPP (β = −0.30, p = 0.02). The level of 2hPP also had a negative relation with the level of vitamin D (β = −0.33, p = 0.03). There was not any relationship between the level of vitamin D and AGEs or other variables. After adjusting for multiple confounders for the multivariate regression model, HSP remained significant. Conclusion: This research indicates the relationship between vitamin D levels and oxidative stress biomarkers in patients with Type 2 diabetes. [ABSTRACT FROM AUTHOR]

Food reformulation can contribute to achieve public health objectives by facilitating access to healthy and sustainable food choices to consumers. Vitamin D is an important micronutrient that contributes to calcium absorption and bone health. Low vitamin D levels may lead to having a higher risk of poor bone and muscle for human health. In this manuscript we investigated, for the first time, United Kingdom consumer willingness to pay (WTP), and heterogeneity preferences for vitamin D fortification of eggs. We used a choice experiment (CE) involving several hypothetical egg products (i.e., pack of 10 eggs) that vary across three attributes levels such as production method (i.e., Cage, Barn, Free‐range, and Organic), vitamin (i.e., no information or by reporting on the pack the claim "Vitamin D added"), and price (i.e., £0.80/pack, £1.90/pack, £3.00/pack, and £4.10/pack). Results suggest that, although on average consumers prefer low‐price eggs produced using the free‐range production method and the information about vitamin D fortification does not affect their valuation, there is a significant preference heterogeneity in consumer preferences associated with animal welfare, environment, health, and price attributes. Particularly, there is a significant preference heterogeneity towards the purchasing of eggs produced using the barn production method. Furthermore, we found that consumer preferences for vitamin D fortification of eggs is affected by consumer's age and the price of eggs. These findings provide useful insights into the psychology of consumer acceptance and attitudes that can be used in communicating the nature of the fortified vitamin D eggs to the public. They also have important implications for future labeling policies and marketing strategies of egg industry. [ABSTRACT FROM AUTHOR]

Melatonin, a product of tryptophan metabolism via serotonin, is a molecule with an indole backbone that is widely produced by bacteria, unicellular eukaryotic organisms, plants, fungi and all animal taxa. Aside from its role in the regulation of circadian rhythms, it has diverse biological actions including regulation of cytoprotective responses and other functions crucial for survival across different species. The latter properties are also shared by its metabolites including kynuric products generated by reactive oxygen species or phototransfomation induced by ultraviolet radiation. Vitamins D and related photoproducts originate from phototransformation of ∆5,7 sterols, of which 7‐dehydrocholesterol and ergosterol are examples. Their ∆5,7 bonds in the B ring absorb solar ultraviolet radiation [290–315 nm, ultraviolet B (UVB) radiation] resulting in B ring opening to produce previtamin D, also referred to as a secosteroid. Once formed, previtamin D can either undergo thermal‐induced isomerization to vitamin D or absorb UVB radiation to be transformed into photoproducts including lumisterol and tachysterol. Vitamin D, as well as the previtamin D photoproducts lumisterol and tachysterol, are hydroxylated by cyochrome P450 (CYP) enzymes to produce biologically active hydroxyderivatives. The best known of these is 1,25‐dihydroxyvitamin D (1,25(OH)2D) for which the major function in vertebrates is regulation of calcium and phosphorus metabolism. Herein we review data on melatonin production and metabolism and discuss their functions in insects. We discuss production of previtamin D and vitamin D, and their photoproducts in fungi, plants and insects, as well as mechanisms for their enzymatic activation and suggest possible biological functions for them in these groups of organisms. For the detection of these secosteroids and their precursors and photoderivatives, as well as melatonin metabolites, we focus on honey produced by bees and on body extracts of Drosophila melanogaster. Common biological functions for melatonin derivatives and secosteroids such as cytoprotective and photoprotective actions in insects are discussed. We provide hypotheses for the photoproduction of other secosteroids and of kynuric metabolites of melatonin, based on the known photobiology of ∆5,7 sterols and of the indole ring, respectively. We also offer possible mechanisms of actions for these unique molecules and summarise differences and similarities of melatoninergic and secosteroidogenic pathways in diverse organisms including insects. [ABSTRACT FROM AUTHOR]

Chronic kidney disease (CKD) has emerged as one of the leading noncommunicable diseases affecting >10% of the population worldwide. Bone and mineral disorders are a common complication among patients with CKD resulting in a poor life quality, high fracture risk, increased morbidity and cardiovascular mortality. According to Kidney Disease: Improving Global Outcomes, renal osteodystrophy refers to changes in bone morphology found in bone biopsy, whereas CKD‐mineral and bone disorder (CKD‐MBD) defines a complex of disturbances including biochemical and hormonal alterations, disorders of bone and mineral metabolism and extraskeletal calcification. As a result, the management of CKD‐MBD should focus on the aforementioned parameters, including the treatment of hyperphosphatemia, hypocalcemia, abnormal PTH and vitamin D levels. Regarding the bone fragility fractures, osteoporosis and renal osteodystrophy, which constitute the bone component of CKD‐MBD, anti‐osteoporotic agents constitute the mainstay of treatment. However, a thorough elucidation of the CKD‐MBD pathogenesis is crucial for the ideal personalized treatment approach. In this paper, we review the pathology and management of CKD‐MBD based on the current literature with special attention to recent advances. [ABSTRACT FROM AUTHOR]

Crewed missions to the Moon may resume as early as 2026 with NASA's Artemis III mission, and lunar dust exposure/inhalation is a potentially serious health hazard that requires detailed study. Current dust exposure limits are based on Apollo‐era samples that spent decades in long‐term storage on Earth; their diminished reactivity may lead to underestimation of potential harm that could be caused by lunar dust exposure. In particular, lunar dust contains nanophase metallic iron grains, produced by “space weathering”; the reactivity of this unique component of lunar dust is not well understood. Herein, we employ a chemical reduction technique that exposes lunar simulants to heat and hydrogen gas to produce metallic iron particles on grain surfaces. We assess the capacity of these reduced lunar simulants to generate hydroxyl radical (OH*) when immersed in deionized (DI) water, simulated lung fluid (SLF), and artificial lysosomal fluid (ALF). Lunar simulant reduction produces surface‐adhered metallic iron “blebs” that resemble nanophase metallic iron particles found in lunar dust grains. Reduced samples generate ~5–100× greater concentrations of the oxidative OH* in DI water versus non‐reduced simulants, which we attribute to metallic iron. SLF and ALF appear to reduce measured OH*. The increase in observed OH* generation for reduced simulants implies high oxidative damage upon exposure to lunar dust. Low levels of OH* measured in SLF and ALF imply potential damage to proteins or quenching of OH* generation, respectively. Reduction of lunar dust simulants provides a quick cost‐effective approach to study dusty materials analogous to authentic lunar dust. [ABSTRACT FROM AUTHOR]

Aims Methods Results Conclusion The reference nutrient intake for vitamin D in people aged ≥4 years is 10 μg/day (400 IU/day) in the UK, but the recommended daily allowance is 15 μg/day (600 IU/day) for people aged 1–70 years in the USA. Here, we aim to compare the 25‐hydroxyvitamin D (25(OH)D) serum concentration profiles between the 2 doses.With world‐wide trial data of adults aged ≥18 years, 45–93 kg, we constructed a minimal physiologically based pharmacokinetics model of serum concentrations of vitamin D and 25(OH)D using nonlinear mixed effects modelling. We used this model to forecast the mean, 2.5th and 97.5th percentiles for serum 25(OH)D concentrations in British adults aged ≥16 years.Our final model used bodyweight to adjust volume of each compartment and maximum clearance of 25(OH)D. No other covariate was identified. The model accurately predicted independent data from trials of a broad range of dosing regimens. We simulated British adults and showed that circulating 25(OH)D concentrations in 95% of people taking 10 μg/day for a year is predicted to reach 50 nmol/L in 32 weeks, while 97.5% of those on 15 μg/day were predicted to attain this threshold within 28 weeks.Both doses are efficacious in >95% of the British population. The daily dose of 15 μg can help 97.5% of the British adults achieve 50 nmol/L serum 25(OH)D and reach the 25 nmol/L threshold in 4 weeks. [ABSTRACT FROM AUTHOR]