BioStacks
Life Extension

Vitamin C and Bio-Quercetin Phytosome

1 Tablet · 250 servings · $0.10/serving

iHerbAmazon

Best for

Immune

Ingredients (4)

Vitamin C

100%

Dose

1000 mg

Target

50–250 mg

Form

Budget

Bio-Quercetin Phytosome

3%

Dose

15 mg

Target

500–1000 mg

Form

—

Quercetin

1%

Dose

5 mg

Target

500–1000 mg

Form

—

Phosphatidylcholine Complex

Doses not disclosed by manufacturer

Other Ingredients (10)

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Vegetable StearateLubricant

A plant-derived salt of stearic acid (typically magnesium or calcium) used as a tablet lubricant

Croscarmellose SodiumDisintegrant

Cross-linked cellulose derivative used as a superdisintegrant

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

HypromelloseCapsule

Plant-derived capsule material from cellulose

Microcrystalline CelluloseBinder

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

Purified WaterSolvent

Water meeting USP specifications used as solvent/vehicle in gummies and liquids

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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