Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg, 60 Tablets supplement bottle
Mason Natural

Quercetin Complex Supports Respiratory and Immune Health, 625 mg, 60 Tablets

What We Researched
2 active ingredients analyzed · 6 inactive ingredients decoded · 2 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
75
Product Score Fair
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium (as tricalcium phosphate) 25 mg 2%
Quercetin Complex containing:50 mg of Vitamin C (as ascorbic acid), 500 mg Quercetin dihydrate (Dimorphandra Mollis), Citrus Bioflavanoid and Apple Pectin 625 mg *
Bioavailability Fair

Absorption Rating

  • Calcium (as tricalcium phosphate) Fair
  • Quercetin Complex containing:50 mg of Vitamin C (as ascorbic acid), 500 mg Quercetin dihydrate (Dimorphandra Mollis), Citrus Bioflavanoid and Apple Pectin Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Hydroxypropyl Cellulose
  • Stearic Acid
  • Croscarmellose Sodium
  • Vegetable Magnesium Stearate
  • Silicon Dioxide
Efficacy Fair

Dosage Analysis

  • Calcium (as tricalcium phosphate) 25 mg Under-dosed
  • Quercetin Complex containing:50 mg of Vitamin C (as ascorbic acid), 500 mg Quercetin dihydrate (Dimorphandra Mollis), Citrus Bioflavanoid and Apple Pectin 625 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calcium (as tricalcium phosphate) 25 mg 2%
Quercetin Complex containing:50 mg of Vitamin C (as ascorbic acid), 500 mg Quercetin dihydrate (Dimorphandra Mollis), Citrus Bioflavanoid and Apple Pectin 625 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.

Hydroxypropyl Cellulose Safe

Binds tablet ingredients and can form tablet coatings.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$23$22$21$20$19 Mar 12 $20.99
Vitacost

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

Brand Trust Report
Mason Natural

Founded 1967 · Miami Lakes, Florida, USA · 161 products · masonvitamins.com

Certifications

2 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

4 incidents
Recall Herbal Colon Cleanser Capsules2025-09-02Source
Recall Healthy Sense Daily Multiple with Iron and People's Choice Women's Daily Vitamins with Iron2022-11-17Source
Prop 65 Lead2017-03-10Source
Prop 65 Lead2016-03-28Source
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Frequently Asked Questions
Is Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg a good supplement?

Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg, 60 Tablets received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 2 active ingredients with 60 servings per container. All 6 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Mason Natural, holds a brand trust score of 66/100 with 2 verified certifications including Consumerlab, Fda Gmp Inspections.

What are the ingredients in Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg?

Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg contains 2 active ingredients: Calcium (as tricalcium phosphate) (25 mg), Quercetin Complex containing:50 mg of Vitamin C (as ascorbic acid), 500 mg Quercetin dihydrate (Dimorphandra Mollis), Citrus Bioflavanoid and Apple Pectin (625 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg safe to take?

Mason Natural Quercetin Complex Supports Respiratory and Immune Health, 625 mg, 60 Tablets has been analyzed for ingredient safety across all its components. All 6 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 Mason Natural a trustworthy supplement brand?

Mason Natural receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1967 and headquartered in Miami Lakes, Florida, USA, the company offers 161 products in their lineup. They hold 2 verified certifications including Consumerlab, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Mason Natural has 4 historical regulatory incidents on record, which are factored into the trust score.

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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.