Can B12 help with Haut?

Vitamin B12 (cobalamin) is essential for cell division, DNA synthesis, and red blood cell formation—all processes that influence skin health. Deficiency can cause pallor, hyperpigmentation (melasma), vitiligo-like spots, or inflammatory changes (glossitis, cheilitis). However, evidence for a skin-improving effect of B12 in people without deficiency is weak. Studies show that supplementation corrects skin symptoms when a deficit exists, but at normal levels, extra B12 generally provides no cosmetic benefit. Most MyBody-X tests (e.g., nutrient deficiency panel) measure blood B12, reliably ruling out deficiency. Caveat: High-dose B12 (e.g., injections) without deficiency is unnecessary and may be harmful in rare conditions (e.g., polycythemia vera). For common skin concerns like acne or wrinkles, B12 is not an evidence-based intervention. Evidence rating: mixed—helpful in deficiency, otherwise marketing.