Biotin
Backed by 34 studiesOverall grade based on research across 1 ingredient.
52out of 100Grade C
Research evidence score
Weighed against 34 published studies · led by Biotin
Ingredient breakdown
C
BiotinSupports hair and nail growth
Research direction: Leans supportiveEvidence: 34 studiesDose: 5000 mcgEvidence strength: Moderate - supportive but mixed
Effectiveness of Biotin Supplementation for Hair Growth in Patients with Alopecia: A Systematic Review (2026)A Review of the Use of Biotin for Hair Loss. (2017)The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study. (2025)
This summary describes only the ingredients and the research behind them — it is not a judgment of the product or its marketing. Grades reflect the weight of published evidence cross-referenced against 350M+ research papers. How we grade →
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