Quercetin
Product Analysis
Transparency Excellent
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Quercetin Bioflavonoids extract | 235 mg | † |
| Citrus Bioflavonoids extract (as Citrus Fruits) | 235 mg | † |
| Bromelain (as Pineapple) | 45 mg | † |
| Rutin extract | 45 mg | † |
Bioavailability Good
Absorption Rating
- Quercetin Bioflavonoids extract Fair
- Citrus Bioflavonoids extract (as Citrus Fruits) Fair
- Bromelain (as Pineapple) Good
- Rutin extract Fair
Other Ingredients Excellent
Fillers & Additives
- Gelatin Capsule
- Rice Powder
- Magnesium Stearate
- Silica
Efficacy Very Poor
Dosage Analysis
- Quercetin Bioflavonoids extract 235 mg Under-dosed
- Citrus Bioflavonoids extract (as Citrus Fruits) 235 mg Under-dosed
- Bromelain (as Pineapple) 45 mg Under-dosed
- Rutin extract 45 mg Under-dosed
Supplement Facts
| Ingredient | Amount | % Daily Value |
|---|---|---|
| Quercetin Bioflavonoids extract | 235 mg | † |
| Citrus Bioflavonoids extract (as Citrus Fruits) | 235 mg | † |
| Bromelain (as Pineapple) | 45 mg | † |
| Rutin extract | 45 mg | † |
Other Ingredients
Price Comparison
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Certifications
5 certifications
Transparency
4 claims
Violation History
5 incidents
Is Natural Factors Quercetin a good supplement?
Natural Factors Quercetin received a product quality score of 65/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 4 active ingredients All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Natural Factors, holds a brand trust score of 88/100 with 5 verified certifications including B Corp Certified, Usp Verified, Fda Gmp Inspections, Non Gmo Project.
What are the ingredients in Natural Factors Quercetin?
Natural Factors Quercetin contains 4 active ingredients: Quercetin Bioflavonoids extract (235 mg), Citrus Bioflavonoids extract (as Citrus Fruits) (235 mg), Bromelain (as Pineapple) (45 mg), Rutin extract (45 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.
Is Natural Factors Quercetin safe to take?
Natural Factors Quercetin has been analyzed for ingredient safety across all its components. All 4 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.
Is Natural Factors a trustworthy supplement brand?
Natural Factors receives a brand trust score of 88/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1950 and headquartered in Coquitlam, British Columbia, Canada, the company offers 390 products in their lineup. They hold 5 verified certifications including B Corp Certified, Usp Verified, Fda Gmp Inspections, Non Gmo Project. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Natural Factors has 5 historical regulatory incidents on record, which are factored into the trust score.
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