If your goal is hair, skin, and nail support, this formula targets it from three different angles with **Biotin** at 5,000mcg, **Keratin** at 500mg, and **Hyaluronic Acid** at 20mg. What this means for you: the keratin is a solubilized form (Cynatine HNS), which has a small number of studies suggesting it may support hair strength and nail integrity from within.

Biotin at this dose is meaningful only if you're deficient — in people with normal biotin levels, clinical research has not demonstrated hair or nail benefits at any dose. The hyaluronic acid at 20mg is dosed well below the 120–240mg range used in skin hydration studies, putting it at roughly 8–17% of the effective dose.

The biggest question mark is keratin itself. While the concept of supplementing the structural protein your hair is made of sounds logical, the clinical evidence is limited to a few small industry-funded trials. You're relying heavily on an ingredient that still needs more independent research.

BioStacks
Dr. Mercola

Hair, Skin and Nails, 30 Capsules

Capsule · 30 servings · $1.10/serving

61 / 100Good

Supports

Score Breakdown

Formulation
70
Safety
87
Final score
61/100

Ingredients (3)

Biotin5000 mcg

Optimal dose

Low Density Hyaluronic Acid20 mg

Within effective range

Keratin500 mg

Within effective range · Premium form

Label Nutrition Facts

Other Ingredients

Fillers, coatings, and additives

3Safe1Caution

Rice ExtractFiller

Caution

Capsule ShellCapsule

Safe

Gum AcaciaBinder

Safe

Vegetable OilCarrier

Safe

Organic rice hull

Unknown

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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.