Relations between serum magnesium and calcium levels and body composition and metabolic parameters in women with fibromyalgia

Abstract Objective Correlate serum magnesium (Mg) and Calcium (Ca) levels with body composition and metabolic parameters in women with fibromyalgia (FM). Patients and methods Cross-sectional study compared with a control group paired by age and body mass index (BMI) of adult women diagnosed with fibromyalgia. All participants went through assessment of their body composition through dual-energy X-ray absorptiometry (DXA) and had blood samples collected for dosing of Mg, Ca, C-reactive Protein (CRP), lipidogram and glycemia. Results: 53 women with FM (average age 48.1 ± 8.2 years, average BMI 26.6 ± 4.5 kg/m2) and 50 control women (average age 47.1 ± 9.9 years, average BMI 25.6 ± 3.6 kg/m2) participated in the study. Serum levels turned out to have inverse correlation with CRP in the FM group (r = − 0.29, p = 0.03) and with BMI and glycemia in the control group (r = 0.31; p = 0.02 and r = 0.48; p = 0.0004 respectively). Serum levels of calcium correlated with triglycerides (r = 0.29; p = 0.03) in the FM group and with glycemia in the control group (r = 0.64; p = 0.0001). Conclusions In patients with FM, magnesemia turned out to have inverse correlation with CRP and calcemia had positive association with triglycerides.