Quercetin 500 mg with Zinc & Copper

Name: Quercetin 500 mg with Zinc & Copper
Brand: Natural Factors

capsule60 servings1 Capsule(s)

VeganVegetarianGluten FreeDairy FreeSugar Free

/100top label

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Supplement Facts

Ingredient	Amount	% DV% Daily Value — how much of the recommended daily intake one serving provides, based on a 2,000 calorie diet. 100% = full daily need. Values over 100% are common for water-soluble vitamins (B, C) and generally safe. Values over 200% are highlighted.
Zinc	15 mg	136%
Copper	1 mg	111%
Quercetin	500 mg	—

Other ingredients: Vegetarian Capsule, Microcrystalline Cellulose, Stearic Acid, Magnesium Stearate, Silicon Dioxide

Score Breakdown

Dosage TransparencyAre all ingredient amounts explicitly listed on the label? Are %DV values provided where applicable? This measures transparency of dosing, not clinical efficacy.

35/35

Label TransparencyHow complete is the labeling? Checks serving info, dietary certifications, and whether any doses are hidden behind proprietary blends.

23/25

Formulation CleanlinessHow clean are the inactive ingredients? Penalizes artificial colors, sweeteners, titanium dioxide. Rewards vegan, gluten-free, organic.

19/25

Ingredient ProfileFormula composition signals: focused vs comprehensive, use of branded/patented forms (KSM-66, Albion, etc.), explicit dosing.

5/15

This score evaluates label quality — dosage disclosure, transparency, cleanliness of inactive ingredients, and formula composition. It does not measure clinical efficacy, bioavailability, or third-party testing. Read full methodology

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General Ingredient Research — not an evaluation of this product

The research summaries below are about the ingredients in general, drawn from published studies that often use different doses, forms, and populations than this product. A "strong" evidence rating for an ingredient does not mean this product will produce that effect — studied doses may be significantly higher or lower than what is contained here. Always verify doses against the Supplement Facts table above.

Zinc

strong

Supports immune function

Zinc is a cofactor for over 300 enzymes involved in immune cell development and function. Supplementation may reduce duration of common cold symptoms, particularly as lozenges. Essential for maintaining immune barrier integrity.

strong

Supports wound healing

Essential for skin integrity and wound repair processes.

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All scores are algorithmically generated from publicly available label data (NIH Dietary Supplement Label Database) and reflect label quality — not clinical efficacy, safety, or product quality. This page is not affiliated with or endorsed by Natural Factors. If you represent this brand and believe any information is inaccurate, please contact us for a correction. Read full methodology