BioStacks
BioSpec Nutritionals

Buffered C-1000

1 Tablet · 90 servings · $0.37/serving

iHerbAmazon

Best for

Immune

Ingredients (3)

Vitamin C

100%

Dose

1000 mg

Target

250–2000 mg

Form

Not listed

Citrus Bioflavonoids

80%

Dose

200 mg

Target

250–1000 mg

Form

—

Calcium

100 mg

Trace amount — not scored

Other Ingredients (5)

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Magnesium StearateLubricant

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

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

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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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