BioStacks
Spring Valley

Extra Strength Hair, Skin & Nails

Capsule · 40 servings

58 / 100Average

Score Breakdown

Formulation
54
Safety
100
Final score
58/100

Ingredients (21)

19 scored · 2 not scored

Biotin5000 mcg

Optimal dose · Premium form

Vitamin D32000 IU

Optimal dose · Premium form

Niacin25 mg

Within effective range

Vitamin ASynergy1515.2 mcg

Optimal dose

Pantothenic Acid15 mg

30% of effective dose · Premium form

Label Nutrition Facts

Other Ingredients

Fillers, coatings, and additives

4Safe

Soy LecithinEmulsifier

Safe

GelatinCapsule

Safe

Vegetable OilCarrier

Safe

GlycerinHumectant

Safe

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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.