Cope or Not✗ COPE
supplements
Biotin for Hair/Skin
Only helps the rare true deficiency; for everyone else it just distorts lab tests.
D
Evidence grade D
No credible supporting evidence
Mechanism
Cofactor for carboxylases; supraphysiological doses have no demonstrated effect on hair growth in non-deficient individuals.
Citations
- A review of the use of biotin for hair lossSkin Appendage Disorders · 2017
The full read
Biotin deficiency is genuinely rare outside specific conditions. Trials in healthy adults show no hair benefit, and megadoses interfere with troponin and thyroid lab assays — a real clinical hazard. The 'hair, skin & nails' aisle is riding one micronutrient's halo.
Aesthetic information, not medical advice. Verdicts reflect the cited evidence at time of writing.