Lay opinion vs evidence: Magnesium Alltag

Magnesium is often marketed as a cure-all for muscle cramps, sleep issues, stress, and heart palpitations. The evidence, however, is more nuanced. For confirmed magnesium deficiency (e.g., due to chronic GI diseases or certain medications), supplementation can be beneficial. In healthy individuals with a balanced diet, extra magnesium usually provides no measurable benefit. Studies on muscle cramps show modest effects, mainly in older adults or pregnant women. For sleep or stress, the data are inconsistent and often based on small or low-quality studies. Many 'magnesium miracle' claims are marketing, not evidence-based medicine. Additionally, excessive intake (especially from supplements) can cause diarrhea and gastrointestinal discomfort. People with kidney impairment should only take magnesium under medical supervision. Bottom line: Magnesium is an essential mineral, but not a panacea. If in doubt, consult a doctor and get a blood test before buying expensive supplements.