Biotin supplementation increases facial hair growth in men.

Is it true that biotin supplementation increases facial hair growth in men?

Partly. Systematic reviews and a clinical review find no consistent evidence that biotin supplementation improves hair growth in healthy people, while a few small industry-linked or self-reported studies of multi-ingredient supplements containing biotin report improved scalp hair thickness or growth in women. None of the retrieved items measures facial hair growth in men specifically.

Verdict: CONTESTED PARTIAL · 4 sources for, 3 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Effects of Oral Supplementation of TrichovitalsTM on Human Skin, Hair and Nail Physiology. (2021). doi.org. https://doi.org/10.52711/2321-5844.2021.00008

Do biotin supplements increase hair growth and strength?. (2012). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/8057/do-biotin-supplements-increase-hair-growth-and-strength

Sylla, S., Bernsley, D., Ojalvo, S. P., & Komorowski, J. (2021). An Open-label Experience Trial to Evaluate the Effects of a Novel Supplement and Hair Serum Combination on Hair, Skin and Nails in Healthy Women. doi.org. https://doi.org/10.1093/CDN/NZAB037_084

M., N., Ch, D. R., & R., K. (2025). Usage of Nutricosmetic on Hair in Selected Samples of Puducherry. zenodo.org. https://doi.org/10.5281/zenodo.16930973

M., N., Rajiny, C., & R., K. (2025). Usage of Nutricosmetic on Hair in Selected Samples of Puducherry. zenodo.org. https://doi.org/10.5281/zenodo.16938889

Moltó-Balado, P., Simeó-Monzo, A., & Barrio-Gonzalez, A. d. (2026). Effectiveness of Biotin Supplementation for Hair Growth in Patients with Alopecia: A Systematic Review. doi.org. https://doi.org/10.3390/dermato6020017

A Review of the Use of Biotin for Hair Loss - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1159/000462981