The lead ingredient here is **MSM** (as OptiMSM) at 1,000 mg — right at the minimum clinical dose for connective tissue and sulfur support. You're also getting 50 mg of **Silicon**, well above the studied range, which contributes to collagen cross-linking and hair/nail strength. **Zinc** at 15 mg hits the low end of the clinical range for skin and immune support, and **Copper** at 2 mg is included at an effective dose to keep your zinc-copper ratio balanced.

**Vitamin C** at 120 mg covers your RDA but falls short of the 250+ mg clinical range used in collagen synthesis research. It'll support basic antioxidant needs but isn't enough to meaningfully boost collagen production on its own.

The biggest gap is the amino acid doses. **L-Lysine** at 50 mg is just 5% of the minimum studied dose (1,000 mg), and **L-Proline** at 50 mg is only 10% of its minimum (500 mg). At these amounts, they're unlikely to contribute meaningfully to your skin or hair goals.

BioStacks
Solgar

Skin, Nails & Hair

2 Tablets · 60 servings · $0.32/serving

iHerbAmazon

Best for

Immune

Ingredients (7)

Copper

100%

Dose

2000 mcg

Target

1000–2000 mcg

Form

Premium

MSM

100%

Dose

1000 mg

Target

1000–3000 mg

Form

—

Zinc

100%

Dose

15 mg

Target

15–30 mg

Form

Standard

Vitamin C

48%

Dose

120 mg

Target

250–2000 mg

Form

Budget

Silicon

100%

Dose

50 mg

Target

5–30 mg

Form

Budget

Other Ingredients (5)

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

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

Microcrystalline CelluloseBinder

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

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

Price Check

$18.92

Near median
$10$20$50

Near the median of 502 vitamin C supplements

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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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