Abstract
We performed a meta-analysis of randomized controlled trials (RCTs) in order to evaluate the effect of oral magnesium supplementation on lipid profile of both diabetic and non-diabetic individuals. PubMed-Medline, SCOPUS, Web of Science, and Google Scholar databases were searched (from inception to February 23, 2016) to identify RCTs evaluating the effect of magnesium on lipid concentrations. A random-effects model and generic inverse variance method were used for quantitative data synthesis. Sensitivity analysis was conducted using the leave-one-out method. A weighted random-effects meta-regression was performed to evaluate the impact of potential confounders on lipid concentrations. Magnesium treatment was not found to significantly affect plasma concentrations of any of the lipid indices including total cholesterol (WMD 0.03mmol/L, 95% CI -0.11, 0.16, p=0.671), LDL-C (WMD -0.01mmol/L, 95% CI -0.13, 0.11, p=0.903), HDL-C (WMD 0.03mmol/L, 95% CI -0.003, 0.06, p=0.076), and triglycerides concentrations (WMD -0.10mmol/L, 95% CI -0.25, 0.04, p=0.149). In a subgroup analysis comparing studies with and without diabetes, no difference was observed between subgroups in terms of changes in plasma total cholesterol (p=0.924), LDL-C (p=0.161), HDL-C (p=0.822), and triglyceride (p=0.162) concentrations. Results of the present meta-analysis indicated that magnesium supplementation showed no significant effects on the lipid profile of either diabetic or non-diabetic individuals.
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