Evidence check: Magnesium in the context of Haut

The question about magnesium in the context of skin is valid, as magnesium is involved in many skin functions: it stabilizes the skin barrier, has anti-inflammatory effects, and may play a role in acne, eczema, or premature skin aging. However, the provided context does not contain direct studies or specific data on magnesium and skin. The included DNA markers (COMT, DRD2, MC1R, MMP1) relate to other aspects (stress, skin cancer risk, collagen breakdown), not magnesium metabolism. The evidence for oral or topical magnesium supplementation to improve skin is overall moderate: there are small clinical studies and mechanistic hints, but no large randomized controlled trials. Moreover, blood magnesium levels are not always representative of tissue status. Recommendations based on individual cases should be viewed critically. Safety note: High magnesium doses can cause diarrhea and electrolyte imbalances. For skin issues, a dermatologist should always be consulted.