Supplement reference
Biotin
A sourced reference on Biotin identity, evidence limits and safety context.
Source and review status
Published sources checked
Sources checked on: 6 September 2026
Qualified clinical review: Pending. This page has not been clinically reviewed.
About this source check
AI-assisted editorial source checking covers the cited material and its stated limits. It is not a systematic review, verification of a supplied product, or clinical sign-off.
Editorial role: InfoAddict. Last material change: 6 September 2026. Next source review: 6 March 2027.
Identity and product form
Biotin is an essential B vitamin present in foods and supplements and acts as a cofactor in fatty-acid, glucose and amino-acid metabolism.
Sources: National Institutes of Health, Office of Dietary Supplements
What the reviewed evidence can and cannot show
NIH says biotin deficiency is rare in healthy people eating a normal mixed diet. Claims for hair, skin and nails are supported at most by case reports and small studies, not a basis for routine treatment claims.
Sources: National Institutes of Health, Office of Dietary Supplements
Safety and limits
NIH warns that supplemental biotin can interfere with some laboratory tests and lead to misleading results. Tell clinicians and laboratories about biotin-containing products.
Sources: National Institutes of Health, Office of Dietary Supplements
Published sources
- Biotin Fact Sheet for Health Professionals
National Institutes of Health, Office of Dietary Supplements. Current NIH fact sheet; accessed 6 September 2026.
Supports: Nutrient or performance-research context and relevant safety limits.
Change history
| Date | Change | Clinical-review status |
|---|---|---|
| 6 September 2026 | Source-linked reference published | Pending |
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