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Effect of Magnesium Supplements on Improving Glucose Control, Blood Pressure and Lipid Profile in Patients With Type 2 Diabetes Mellitus: A systematic review and meta-analysis

Nasiba Al Maqrashi, Salim Al Busaidi, Sara Al-Rasbi, A. A. Al Alawi, J. Al-Maqbali

Sultan Qaboos University Medical Journal, 2025

1,345 participants · 10 citations

Abstract

Summary This study evaluated the effects of magnesium (Mg) supplementation on glycaemic control in type 2 diabetes mellitus through a meta-analysis of 23 randomised controlled trials involving 1,345 participants. Mg supplementation significantly increased serum Mg levels (weighted mean difference [WMD] = 0.69, 95% CI: 0.32 to 1.06) and reduced fasting blood glucose levels (WMD = –0.58, 95% CI: –0.87 to –0.28). However, the impact on glycated haemoglobin was minimal (WMD = –0.16, 95% CI: –0.32 to 0.00). Subgroup analysis showed a greater reduction in glycated haemoglobin among participants aged ≥65 years and those receiving longer durations of supplementation. Additionally, Mg supplementation was linked to lower diastolic blood pressure and potential improvements in lipid profile. This review highlights the importance of considering patient characteristics, dosage and intervention duration in future research on Mg supplementation for glycaemic control in diabetes.

How strong is the evidence?

Evidence Hub reads this as a meta-analysis, done in people. Its evidence level is 1 of 5 (Highest · pooled evidence). Pooled evidence from several studies sits at the top of the evidence pyramid. Reported size: 1,345 participants or records.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

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