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Purpose: Although some caregivers are using epigallocatechin gallate (EGCG) off label in hopes of improving cognition in young adults with Down syndrome (DS), nothing is known about its safety, tolerability, and efficacy in the DS pediatric population. We aimed to evaluate safety and tolerability of a dietary supplement containing EGCG and if EGCG improves cognitive and functional performance., Methods: A total of 73 children with DS (aged 6-12 years) were randomized. Participants received 0.5% EGCG (10 mg/kg daily dose) or placebo for 6 months with 3 months follow up after treatment discontinuation., Results: In total, 72 children were treated and 66 completed the study. A total of 38 participants were included in the EGCG group and 35 in the placebo group. Of 72 treated participants, 62 (86%) had 229 treatment-emergent adverse events (AEs). Of 37 participants in the EGCG group, 13 (35%) had 18 drug-related treatment-emergent AEs and 12 of 35 (34%) from the placebo group had 22 events. In the EGCG group, neither severe AEs nor increase in the incidence of AEs related to safety biomarkers were observed. Cognition and functionality were not improved compared with placebo. Secondary efficacy outcomes in girls point to a need for future work., Conclusion: The use of EGCG is safe and well-tolerated in children with DS, but efficacy results do not support its use in this population., Competing Interests: Conflict of Interest The authors declare no conflicts of interest., (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)

Background and Method: Feeding problems and gastrointestinal disorders are the most common anomalies in people with Down syndrome (DS) and have a significant impact on their daily life. This study lists the various anomalies on the basis of 504 references selected from a PubMed search in October 2018., Results: The anomalies are grouped into three categories: anatomical anomalies: duodenal atresia and stenosis (3.9%), duodenal web and annular pancreas; aberrant right subclavian artery (12% of children with DS with cardiac anomaly); Hirschsprung's disease (2.76%); anorectal malformation (1.16%); congenital vascular malformations of the liver; orofacial cleft, bifid uvula (4.63%), and submucous orofacial cleft; esophageal atresia (0.5-0.9%); pyloric stenosis (0.3%); diaphragmatic hernia; malrotation of small intestine or duodenum inversum; omphalocele, gastroschisis or anomalies of the median line, anomalies of the umbilical vein; biological, immunological, and infectious anomalies: neonatal cholestasis (3.9%); neonatal hepatic fibrosis; Helicobacter pylori infection (75.8% in institutionalized children with DS, between 29.2 and 19.5% in non-institutionalized); non-alcoholic fatty liver disease (NAFLD; 82% in obese and 45% in non-obese); biliary lithiasis (6.9% under 3 years); celiac disease (6.,6%); geographical tongue (4%); hepatitis B virus sensitivity; autoimmune hepatitis and cholangitis; Crohn's disease, inflammatory bowel disease (IBD); pancreatitis; vitamin D deficiency (45.2% in Italy); functional disorders: suction, swallowing and chewing disorders (13 of 19 children with DS under 4 years); gastroesophageal reflux (47% in children with sleep apnea); achalasia (0,5% in adults); obesity (51.6% of males and 40.0% of females in Ireland) and overweight (32.0% and 14.8%); constipation (19.0%). Based on their practice, the authors insist on the following points: malformations are sometimes detected late (chronic vomiting after the introduction of food pieces, resistant constipation despite appropriate measures); prescription of preventive doses of vitamin D is advised; jaundice in a baby with DS may be retentional; in the event of transient leukemoid reaction it is vital to monitor liver function; the patient with geographic tongue must be reassured; for celiac serology there is no consensus on the staring age and the frequency, we propose every year from the age of 2; we advise to test people with DS for H. pylori infection if they are attending specialized institutions; abdominal ultrasounds must be systematic during the first months of life; detection of NAFLD is recommended; people with DS must be vaccinated against hepatitis B; breastfeeding is possible with maternal support; it is important to start speech therapy very early; feeding difficulties are often overlooked by the family and educators; gastroesophageal reflux is often pathological; preventing obesity must start from birth using body mass index for the general population; it is necessary to do everything for their meals to be joyful., (Copyright © 2019 French Society of Pediatrics. Published by Elsevier Masson SAS. All rights reserved.)