This gummy markets itself for hair, skin, and nails, but the doses tell a different story. **Biotin** at 2,500mcg is within the supplemental range, though clinical evidence for hair benefits in people who aren't biotin-deficient is very limited. The **Collagen** at 100mg per serving is about 2% of the minimum clinical dose (5,000mg) used in skin research — far too low to deliver the results you'd expect from a collagen supplement.

**Vitamin C** at 15mg is only 6% of the minimum dose used in clinical studies, and **Vitamin E** comes in the synthetic dl-alpha form, which your body absorbs at roughly half the rate of the natural version — and at 6.75mg, it's well below the studied range of 50–268mg.

The biggest gap here is that the ingredients most relevant to skin and hair — collagen and vitamin C — are present in amounts too small to move the needle. You're primarily getting a biotin supplement in gummy form, and biotin alone has weak evidence for cosmetic benefits unless you have an underlying deficiency.

BioStacks
Nature's Bounty

Optimal Solutions, Hair, Skin & Nails Gummies, Tropical Citrus, 140 Gummies

2 Gummies · 70 servings · $0.21/serving

iHerbAmazon

Best for

Hair

Ingredients (4)

Biotin

100%

Dose

2500 mcg

Target

1000–5000 mcg

Form

—

Vitamin E

14%

Dose

6.8 mg

Target

50–268 mg

Form

Budget

Vitamin C

60%

Dose

15 mg

Target

25–200 mg

Form

Budget

Collagen

2%

Dose

0.1 g

Target

5–20 g

Form

Not listed

Nutrition

Calories, macros & sodium.

  • Sodium10 mg

Other Ingredients (11)

Glucose SyrupSweetener

High glycemic load; source typically corn (generally gluten-free)

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.

SucroseSweetener

Added sugars and high glycemic load; dental caries risk

Fruit Juice (unspecified)Colorant

Juice or juice concentrate used primarily for natural color and flavor in gummies

Natural FlavorsFlavor

Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Citric AcidAcidulant

Natural acid derived from citrus fruits

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

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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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