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Quercetin+C

product on market Capsule The Vitamin Shoppe Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

Vitamin C and quercetin are researched for their roles in supporting immune function and antioxidant activity. While vitamin C has strong evidence for systemic health, research on quercetin's efficacy in humans is more limited. Together, these ingredients may act synergistically to manage oxidative stress.

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

Label

Product Label

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

Label Data

2 Capsule(s)
Serving Size
50
Servings
Other Combinations
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
1400 mg (1555% DV)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)

Other Ingredients

Gelatin Magnesium Stearate
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take two (2) capsules daily, preferably with meals.

Warnings & Precautions

Warning: Consult your healthcare provider prior to use if you are pregnant, nursing, taking any medication or have any medical conditions.

Keep out of reach of children.

Tamper Evident Do not use if outer seal is broken or missing.

Formulation Notes

Immune support Seasonal health Antioxidant support

Gluten-free Dairy-free Soy-free Nut-free Does not contain: Gluten, sugar, salt, preservatives, artificial colors or flavors.

Additional Information

Vitamin

Store in a cool, dry place.

Quality promise tested & trusted

Metadata

Product Details

UPC / SKU7 66536 01267 1
DSLD Entry Date2019-11-21
Product TypeOther Combinations
FormCapsule
BrandThe Vitamin Shoppe
DSLD ID208792
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.