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GNC

Biotin 2500 mcg

1 Capsule · 120 servings · $0.14/serving

iHerbAmazon

Best for

Hair

Ingredients (1)

Biotin

100%

Dose

2500 mcg

Target

1000–5000 mcg

Form

—

Other Ingredients (7)

TalcAnti-caking

IARC classifies cosmetic-grade talc not containing asbestos as Group 2B (possibly carcinogenic to humans); perineal talc use as Group 2A (probably carcinogenic). Johnson & Johnson voluntarily withdrew talc-based baby powder from US/Canada in 2020 and globally in 2022 after extensive litigation tied to ovarian-cancer and mesothelioma cases. The 2018 FDA contamination survey found asbestos in 9 of 52 cosmetic talc products tested. As a supplement excipient talc is a pure manufacturing convenience — no nutritional or functional benefit to the user — so the asbestos-exposure risk has no offsetting upside. Safer alternatives (silicon dioxide, microcrystalline cellulose, rice hulls) are widely available.

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Calcium SilicateAnti-caking

Inorganic compound used as an anti-caking and flow agent in powdered supplements

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

GelatinCapsule

Protein derived from collagen, used in traditional capsule shells

Hydroxypropyl CelluloseBinder

An inert modified-cellulose polymer used as a binder, film-former, and disintegrant.

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

How to Take It

Take it anytime

Timing doesn't matter — but stop taking it 2–3 days before any blood test. Biotin skews thyroid and troponin lab results.

With or without food

On the label

As a dietary supplement, take one capsule daily.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$16.99

$10$20$50

Near the median of 148 vitamin B7 supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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