BioStacks
GNC

Vitamin D-3 25 mcg (1000 IU)

1 Tablet · 180 servings · $0.10/serving

iHerbAmazon

Best for

ImmuneDentalBone & Joint

Ingredients (2)

Vitamin D

100%

Dose

1000 IU

Target

1000–5000 IU

Form

Premium

Calcium

74 mg

Trace amount — not scored

Other Ingredients (6)

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Croscarmellose SodiumDisintegrant

Cross-linked cellulose derivative used as a superdisintegrant

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

Microcrystalline CelluloseBinder

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

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

How to Take It

Take it anytime

Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.

With a meal containing fat

On the label

As a dietary supplement, take one tablet daily.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$17.99

$10$20$50

Cheaper than 65% of 638 calcium 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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