Myths vs facts: B12 and Haut

Vitamin B12 (cobalamin) is critical for cell division, DNA synthesis, and nerve function. A deficiency can indeed cause skin changes: hyperpigmentation (especially on knuckles and hands), glossitis (smooth, red tongue), and mouth ulcers. These symptoms usually appear only after prolonged deficiency, common in vegans without supplementation, gastrointestinal disorders, or pernicious anemia. Myth: B12 supplements improve skin in healthy individuals. There is no strong evidence for this. Studies show no benefit for acne, wrinkles, or skin aging when B12 levels are normal. In fact, very high doses (e.g., injections) may trigger acne in susceptible people by promoting Propionibacterium growth. Fact: A blood test (holotranscobalamin or serum B12) is useful for at-risk groups. MyBody-X does not offer a specific B12 test, but the Menopause Check measures TSH, which can be indirectly related to B12 status (thyroid function). For unexplained skin issues, a doctor’s visit with B12 measurement is advisable. Conclusion: B12 deficiency can cause skin symptoms – that is evidence-based. The idea that B12 supplements beautify skin is overhyped and not supported by science.