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Quercetin Complex

product on market Capsule Natrol Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 67% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Quercetin and citrus bioflavonoids provide antioxidant support, while vitamin C contributes to immune function. Research evidence for these ingredients is generally moderate, though overall evidence coverage for this specific profile is limited. The formulation maintains a high safety score with no significant concerns noted.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Quercetin Complex
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Capsule(s)
Serving Size
25
Servings
Other Combinations
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
1000 mg (1110% DV)
500 mg
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)

Other Ingredients

Gelatin Magnesium Stearate Silicon Dioxide
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take 2 capsules, one time daily, with a meal.

Warnings & Precautions

Warning: Consult your healthcare professional prior to use if you have or suspect a medical condition, are taking prescription drugs, or are pregnant or lactating.

Keep out of reach of children.

Formulation Notes

Natrol Quercetin Complex: A powerful combination of Quercetin, high potency Vitamin C and Citrus Bioflavonoid Complex support a healthy immune system and provide antioxidant protection.

Immune Health Supports immune health Powerful antioxidant formula

With Vitamin C & Citrus Bioflavonoids

No: Milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, yeast, artificial colors or flavors, added sugar or preservatives

Additional Information

Store in a cool, dry place.

Metadata

Product Details

UPC / SKU0 47469 00908 3
DSLD Entry Date2023-06-22
Product TypeOther Combinations
FormCapsule
BrandNatrol
DSLD ID287525
Data Updated2026-04-11
Research

Research Evidence

184
Research Sources
55
Avg Quality
91
Systematic Review
75
Meta Analysis
7
Rct
7
Clinical Trial
2
Cochrane Review
1
Openfda Safety
B Treatment of gouty arthritis with traditional Chinese medicine decoction: Meta-analysis, network pharmacology analysis, and molecular docking
Meta Analysis Medicine 2024 PubMed DOI
B Effects of quercetin supplementation on lipid profile: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2017 PubMed
B Dietary polyphenols and the risk of metabolic syndrome: a systematic review and meta-analysis
Meta Analysis BMC endocrine disorders 2024 PubMed DOI
B Quercetin and endurance exercise capacity: a systematic review and meta-analysis
Meta Analysis Medicine and science in sports and exercise 2011 PubMed DOI
B Dietary flavonoid intake and smoking-related cancer risk: a meta-analysis
Meta Analysis PloS one 2013 PubMed DOI
B Clinical efficacy evaluation and potential mechanism prediction on Guizhi-Shaoyao-Zhimu decoction in the treatment of gouty arthritis based on meta-analysis, network pharmacology analysis, and molecular docking
Meta Analysis Medicine 2023 PubMed DOI
B A Systematic Review: Quercetin-Secondary Metabolite of the Flavonol Class, with Multiple Health Benefits and Low Bioavailability
Systematic Review International journal of molecular sciences 2024 PubMed DOI
B Dietary flavonoid for preventing colorectal neoplasms.
Cochrane Review The Cochrane database of systematic reviews PubMed DOI
B Flavonoids for treating venous leg ulcers.
Cochrane Review The Cochrane database of systematic reviews PubMed DOI
B The effects of quercetin supplementation on lipid profiles and inflammatory markers among patients with metabolic syndrome and related disorders: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2020 PubMed DOI
View all evidence for Quercetin →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.