If you're hoping for hair, skin, or nail support, this **Biotin** supplement delivers 10,000 mcg per tablet — well above the 1,000–5,000 mcg range commonly found in similar products. However, biotin supplementation has only shown clear benefits in people who are actually deficient. If your levels are normal, the clinical evidence for hair or nail improvement is weak.

The 96 mg of **Calcium** (as carbonate) is minimal and unlikely to contribute meaningfully to your daily intake. It's there as a tablet binder, not a functional dose.

The biggest thing to know before buying: biotin's reputation far outpaces its research. There are no well-designed RCTs proving it grows hair or strengthens nails in healthy, non-deficient adults. If you suspect a deficiency, this dose is more than adequate — but if you're hoping for cosmetic results on its own, the evidence isn't there to support that expectation.

BioStacks
21st Century

Biotin 10,000 mcg

1 Tablet · 120 servings · $0.08/serving

iHerbAmazon

Best for

Hair

Ingredients (2)

Biotin

100%

Dose

10000 mcg

Target

1000–5000 mcg

Form

—

Calcium

96 mg

Trace amount — not scored

Other Ingredients (3)

MaltodextrinBinder

Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.

Microcrystalline CelluloseBinder

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

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

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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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