Biotin drastically improves hair growth
7.0Moderate
evidence
evidence
The Claim
It is a widespread belief that biotin can lead to noticeably thicker and longer hair when taken as a supplement, making it popular in hair care products.
Origin
This myth has been perpetuated by beauty and health industries, as well as testimonials from celebrities and influencers.
What Science Says
Research indicates that biotin supplementation may benefit individuals with a biotin deficiency who experience hair thinning. However, for those with normal levels, studies, including randomized controlled trials, do not show a significant impact on hair growth. The effect size in deficient individuals is moderate, but not applicable to the general population.
Verdict
Partially True
Sources
- PMID:38688776 Efficacy of 5% topical minoxidil versus 5 mg oral biotin versus topical minoxidil and oral biotin on hair growth in men: randomized, crossover, clinical trial.
- PMID:28628687 The Infatuation With Biotin Supplementation: Is There Truth Behind Its Rising Popularity? A Comparative Analysis of Clinical Efficacy versus Social Popularity.