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Biotin

Beauty

Also known as: Vitamin B7, Vitamin H, Biotin (D-Biotin), d-biotin, coenzyme R

B
Grade B
💊 2500-5000mcg daily🎯 8 primary uses🔗 3 synergies⚠️ Review warnings
Compare Check interactions
Levels upVitality+50 pts

Overview

A water-soluble B vitamin essential for hair, skin, and nail health and serves as a coenzyme in amino acid and glucose metabolism. D-biotin is the naturally active form.

Primary Uses
Hair healthNail strengthSkin healthHair, skin, and nail healthGlucose metabolism supportAmino acid metabolismKeratin productionBiotin deficiency prevention

Frequently Asked About Biotin

How much Biotin should I take?
The typical effective range is 300-1,000 mcg. Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.
When is the best time to take Biotin?
Any time. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.
Should I take Biotin with food?
Optional.
Does Biotin interact with medications?
Yes — known interactions include None significant. If you take any prescription medication, talk to your doctor or pharmacist before starting Biotin.
What does Biotin pair well with?
Biotin stacks well with Collagen, Silica, and Other B vitamins — these combinations either improve absorption or work synergistically toward common goals.
Who should not take Biotin?
Biotin should be avoided or used with caution by people with None. Pregnant or breastfeeding women should consult a healthcare provider before use.
What are the side effects of Biotin?
Most people tolerate Biotin well. The most commonly reported side effects are Acne in some people. Side effects are usually dose-dependent — lowering the dose often resolves them.

Dosage

Typical range
2500-5000mcg daily
Timing
Any time
With food
Optional
Dose Tiers
RDA / DV
30 mcg
Moderate
300-1,000 mcg
Therapeutic
2,500-10,000 mcg
Upper Limit
No established UL
Duration

3-6 months for hair effects

Special Populations

Hair loss (if deficient), brittle nails

Research & Studies

Search the literature now

We haven’t curated landmark studies for Biotinyet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.

Search Biotin research
PubMed (RCTs) ↗Randomized trialsPubMed (all) ↗Full literatureCochrane Reviews ↗Systematic reviewsExamine.com ↗Research summaries
Browse all curated studies →

Mechanism of Action

  • • Cofactor for keratin production
  • • Cellular energy
  • • Fatty acid metabolism

Evidence Quality

Evidence Grade B

Popular, but only helps if deficient

Safety & Contraindications

Serious Warnings
  • • Interferes with lab tests (thyroid, cardiac)
Contraindications
  • • None
Common Side Effects
  • • Acne in some people
Pregnancy & Breastfeeding

Consult healthcare provider

Liver & Kidney Notes

Safe

Interactions

💊 Medications
  • • None significant
🧪 Supplements
  • • Part of B complex
🍽️ Food & Alcohol
  • • No interactions

Stacking & Synergies

Avoid Combining With
None
Best Goal Synergies
HairNails

Buying Guide

What to Look For
  • • Any quality brand
Standardization Markers
Biotin content
Adulteration risk
Low
Practical Notes
  • • Stop 72h before lab tests
  • • Only helps if deficient
Tags
beautyhairnailsB vitaminhair-skin-nailsb-vitaminwater-solublemetabolism

Top Products with Biotin

Highest-scored catalog products containing Biotin, ranked by our scoring engine.

Browse all Biotin products →

Related Guides

In-depth guides covering Biotin — protocols, comparisons, and use cases.

More in Beauty

Other ingredients in the Beauty category.

Horsetail Extract
Natural source of silica for hair, skin, and nail strength. Traditional beauty remedy.
C
Keratin (Solubilized)
Hair and nail protein in absorbable form. Provides building blocks for keratin structures.
C
Browse all Beauty ingredients →
Last reviewed: June 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.
Cite this page
Formulate Research Team. (2026, June). Biotin — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/biotin

Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.