BioStacks
Pure Encapsulations

Ester-C & Flavonoids

1 Capsule · 180 servings

iHerbAmazon
77 / 100Good

Best for

Immune

Score Breakdown

Formulation
77
Safety
100
Final score
77/100

Ingredients (5)

Vitamin C

100%

Dose

619 mg

Target

50–250 mg

Form

Standard

Rutin

40%

Dose

100 mg

Target

250–500 mg

Form

—

Quercetin

10%

Dose

50 mg

Target

500–1000 mg

Form

—

Calcium

68 mg

Trace amount — not scored

Threonic Acid

7 mg

Unit not recognized — not scored

Other Ingredients (3)

Ascorbyl PalmitateAntioxidant

Fat-soluble form of vitamin C used as preservative

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

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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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