What to watch with Magnesium and Darmgesundheit?

Magnesium and gut health are closely linked. Magnesium supplements, especially citrate or oxide forms, can cause diarrhea due to their osmotic effect, particularly at doses above 350 mg/day. This may disrupt the gut microbiome and lead to electrolyte imbalances. Conversely, magnesium supports bowel muscle function and can relieve constipation. Individuals with sensitive guts (e.g., IBS) should prefer well-tolerated forms like magnesium glycinate or bisglycinate. Evidence is mostly mechanistic; no strong clinical trials exist for optimal combination strategies. Caution is advised when taking medications or if kidney function is impaired. A magnesium status test (e.g., RBC magnesium) may help before high-dose supplementation.