**Biotin** at 10,000mcg per serving is double the top of the studied supplement range (1,000–5,000mcg), but the clinical reality is that biotin supplementation primarily helps people with an actual deficiency or brittle nail syndrome. If you're not deficient, the research supporting hair and nail benefits is thin — regardless of dose. The D-Biotin form is the standard bioactive version, so no concerns there.
**Zinc** at 10mg falls short of the 15–30mg range used in clinical research for immune and skin support, and it's delivered as zinc citrate — a decent but not top-tier form. **Selenium** is dosed at just 55mcg (the bare RDA), which is roughly half the 100–200mcg range studied for thyroid and antioxidant benefits, and uses sodium selenite — an inorganic form your body retains less efficiently.
The biggest gap: both supporting minerals are underdosed for therapeutic benefit, so you're essentially getting a high-dose biotin supplement with token amounts of zinc and selenium. If immune or thyroid support matters to you, you'd need to supplement those minerals separately.
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What it does
A combination of 3 label ingredients.
Selenium
sodium seleniteBudget
Supports normal thyroid hormone metabolism and enzymes that protect cells from oxidative damage.
Vitamin B7
Form not confirmedGrade —
Supports normal fat and amino-acid metabolism; hair-growth benefits without deficiency have not been established.
Ingredients (3)
Other ingredients
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Lab testing
How to take it
With food
Space it a couple of hours from Iron and Calcium
On the label
Take 2 tablets daily with a full glass of water.
Price check
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What 140 vitamin B7 supplements cost
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.
Not medical advice. Consult your healthcare professional.