Evidence check: Magnesium in the context of Darmgesundheit

Magnesium is essential for gut health: it supports intestinal muscle contraction (peristalsis) and acts as a cofactor for many enzymes. Low magnesium is linked to constipation, and supplementation (e.g., magnesium citrate) can improve stool frequency – but evidence is moderate, mostly from observational studies and small trials. High doses have an osmotic laxative effect, which may worsen diarrhea in IBS. Gut microbiota influence magnesium absorption, and deficiency may impair the intestinal barrier. However, claims that magnesium 'cures' gut issues are overblown. Chronic bloating, cramps, or irregularity require medical evaluation. Consumer tests often overstate magnesium's role in gut health; blood levels don't reflect gut status. Evidence level: human-moderate.