How are B12 and Haut related?

Vitamin B12 (cobalamin) is essential for DNA synthesis, cell division, and red blood cell formation. A deficiency can lead to various skin manifestations, including hyperpigmentation, vitiligo, glossitis (inflamed tongue), and pallor due to megaloblastic anemia. These skin changes are non-specific and typically appear only in advanced deficiency. The provided context does not contain any direct studies or test results linking B12 to skin health. The evidence here is based on general biochemical knowledge and clinical observation, not on the given sources. Therefore, the evidence level is mechanistic. Caveat: While consumer B12 tests can be useful, skin symptoms alone are not diagnostic. A healthcare provider should evaluate suspected deficiency with appropriate blood tests and consider supplementation if needed.