Strong evidencevitamin
Biotin for Hair Thinning
Biotin is a cofactor for carboxylase enzymes involved in keratin protein synthesis. It supports hair follicle stem cell proliferation, improves hair shaft cortex structure, and reduces brittleness. Deficiency causes diffuse alopecia.
How strong is the research?
Strong evidence
Based on a randomised controlled trial (RCT) — the gold standard for establishing cause and effect.
Research source
SourcePatel DP et al. · Skin Appendage Disorders 2017How much to take
2500–5000 mcg
Allow 3-6 months for visible hair changes. Note: biotin can interfere with some lab tests (thyroid, troponin). Discontinue 48h before blood work.
When to take it
Best taken: morning