GNC Quercetin 500 mg supplement bottle
GNC

Quercetin 500 mg

What We Researched
1 active ingredient analyzed · 9 inactive ingredients decoded · 5 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
86
Product Score Good
88
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Quercetin (as Quercetin Dihydrate) 500 mg
Bioavailability Fair

Absorption Rating

  • Quercetin (as Quercetin Dihydrate) Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Stearic Acid
  • Magnesium Stearate
  • Ethylcellulose
  • Carnauba Wax
  • Triacetin
  • Polyethylene Glycol Low
  • Oleic Acid
  • Diacetylated Monoglycerides
Efficacy Excellent

Dosage Analysis

  • Quercetin (as Quercetin Dihydrate) 500 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Quercetin (as Quercetin Dihydrate) 500 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Ethylcellulose Generally_safe

It is used as a coating to control the release of supplement ingredients.

Carnauba Wax Safe

Provides a glossy, protective coating on tablets.

Triacetin Generally_safe

It is used as a solvent or humectant.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Oleic Acid Safe
Diacetylated Monoglycerides Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$27$26$25$24$23 Mar 12 $24.99
GNC

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
GNC

Founded 1935 · Pittsburgh, Pennsylvania, USA · 200 products · gnc.com

Certifications

5 certifications
Informed Sport Verified Source
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Claimed
Related Supplements
Frequently Asked Questions
Is GNC Quercetin 500 mg a good supplement?

GNC Quercetin 500 mg received a product quality score of 86/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 1 active ingredients Of the 9 inactive ingredients, 5 are rated safe and 1 are flagged for review. The manufacturer, GNC, holds a brand trust score of 88/100 with 5 verified certifications including Informed Sport, Consumerlab, Fda Gmp Inspections, Usda Organic.

What are the ingredients in GNC Quercetin 500 mg?

GNC Quercetin 500 mg contains 1 active ingredients: Quercetin (as Quercetin Dihydrate) (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is GNC Quercetin 500 mg safe to take?

GNC Quercetin 500 mg has been analyzed for ingredient safety across all its components. Of 9 inactive ingredients, 5 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is GNC a trustworthy supplement brand?

GNC receives a brand trust score of 88/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1935 and headquartered in Pittsburgh, Pennsylvania, USA, the company offers 200 products in their lineup. They hold 5 verified certifications including Informed Sport, Consumerlab, Fda Gmp Inspections, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.