Is Magnesium useful for Haut?

Magnesium is an essential mineral involved in over 300 enzymatic reactions, including those relevant to skin health. It has anti-inflammatory properties, supports the skin barrier, and may help with acne or eczema by regulating cortisol and promoting collagen production. However, the evidence for a direct, clinically meaningful effect of magnesium on skin is limited. Most data come from in vitro or observational studies, not large randomized controlled trials. Deficiency can contribute to dry, irritated skin, but supplementation beyond dietary intake is only advisable if a deficiency is confirmed. Topical magnesium (e.g., in creams) is often marketed, but skin absorption is low and study results are mixed. For skincare, factors like hydration, sun protection, and a balanced diet are far more important. A DNA or microbiome test from MyBody-X cannot provide specific magnesium recommendations for skin. The evidence is mechanistic, not strongly human-validated.