Biotin

Beauty

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

Grade B

💊 2500-5000mcg daily🎯 8 primary uses🔗 3 synergies⚠️ Review warnings

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

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

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

CollagenSilicaOther B vitamins

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

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.

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.

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.