What to watch with Magnesium and Haut?

The combination of magnesium and skin is not well studied scientifically. Magnesium is involved in skin barrier function and inflammation regulation, but evidence for direct effects of magnesium supplements on skin conditions like acne or eczema is weak (mechanistic, no large RCTs). Orally, excessive magnesium (above 350–400 mg/day) can cause diarrhea and stomach cramps. Topical magnesium (e.g., in creams or bath salts) is often marketed, but there are few studies on efficacy or safety for sensitive skin. Watch for possible skin irritation with direct application. MyBody-X tests for magnesium and skin are not validated; do not rely on genetic tests for individual dosing. Consult a dermatologist for skin issues.