Magnesium supplements most likely to cause diarrhoea: Causes, risk factors, and management tips

Magnesium supplements, while beneficial, can cause diarrhoea due to unabsorbed magnesium drawing water into the intestines, especially with citrate and oxide forms. The NHS recommends a supplemental upper limit of 350 mg/day to avoid adverse effects. Prioritising magnesium-rich foods and opting for gentler supplement forms like glycinate can help manage intake and prevent digestive upset.