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
Levels upSkin & Beauty+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.
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
Pairs Well With
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.
Collagen Powder for WomenNutricost93
Advanced NutrientsThorne88
Basic Nutrients 2/DayThorne88
Basic PrenatalThorne88
Related Guides
In-depth guides covering Biotin — protocols, comparisons, and use cases.
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Last reviewed: September 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.
Cite this page
Formulate Research Team. (2026, September). 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.