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Vitamin

Biotin

Last reviewed September 28, 20261 sources
In short

Biotin is a B vitamin involved in metabolizing fats, carbohydrates and protein. It is widely marketed for hair and nails, but deficiency is rare.

Research in progress. This ingredient page doesn’t yet meet SuppScout’s bar for a complete reference (sourced evidence summary, considerations and sufficient detail), so search engines are asked not to index it. The information shown is sourced where cited.

Quick facts

Adequate Intake (adults)
30 mcg/day[1]

Common biotin supplement forms

  • D-biotin

Detailed form pages for Biotin are being researched.

Typical amounts in supplements

Many supplements contain 1,000–10,000 mcg — far above the Adequate Intake.

[1]

These describe what supplements commonly contain and published reference values — not a recommendation for you.

Food sources

  • Eggs (cooked)
  • Salmon
  • Seeds and nuts

Potential considerations

  • High-dose biotin can interfere with some laboratory tests, including some thyroid and heart tests, and cause incorrect results. Tell your clinician before blood work.

Products containing biotin

No products listed yet

SuppScout hasn’t added biotin products yet.

Sources & references

  1. Biotin: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. ods.od.nih.govGovernment

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This page is educational and is not medical advice. Talk to a healthcare professional before starting a supplement, especially if you have a medical condition, take medications, or are pregnant or breastfeeding. Medical disclaimer.