How are Magnesium and weight loss related?

Magnesium is involved in energy metabolism, insulin sensitivity, and fat oxidation. Observational studies suggest an inverse association between magnesium intake or serum levels and body weight or waist circumference. Proposed mechanisms include improved glucose disposal, reduced inflammation, and enhanced mitochondrial function. However, randomized controlled trials of magnesium supplementation for weight loss show small or inconsistent effects, and the overall evidence is moderate at best. Correcting a deficiency may support metabolic health, but supplementing in replete individuals is unlikely to cause significant weight loss. Genetic variants in magnesium transporters (e.g., TRPM6) can influence magnesium status, but DTC genetic tests are not diagnostic and should not be used to guide high-dose supplementation. Safety note: excessive magnesium intake can cause gastrointestinal discomfort and diarrhea.