What to watch with MC4R and Haut?

The question about MC4R and skin („Haut“) is unusual because MC4R (melanocortin-4 receptor) is primarily expressed in the brain and plays a central role in appetite regulation and energy homeostasis. There is no robust evidence that MC4R variants directly affect skin health. Some studies investigate the melanocortin system (MC1R, MC2R, MC5R) in skin, but MC4R is barely detected functionally there. MyBody-X or similar tests may list MC4R polymorphisms, but the clinical relevance for skin is speculative. A possible indirect link via obesity and skin issues (e.g., acne, inflammation) is not strongly supported. Beware of exaggerated marketing claims. For skin concerns, consult a dermatologist, not a genetic test. Evidence grade: marketing/unclear.