🟢 100/100

This product looks safe

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

Product Label

📸

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Label Data

1 Capsule(s) Serving Size
60 Servings
Non-Nutrient/Non-Botanical Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

500 mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 500mg
100 mg
📊 Market median: 200.0mg (136 products) 📚 3 studies — no high-quality reviews
This product: 100mg

Other Ingredients

Vegetable Magnesium Stearate Silicon Dioxide Vegetable Hypromellose Water, Purified

Label Claims — Verification

All Other
Structure/Function
All Other (99% of products) Structure/Function (84% of products) Nutrient (23% of products) Qualified Health (1% of products)

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Gluten Free Dairy Free Sugar Free

Product Information

📋 Directions for Use

Directions for use: Adults: Take 1 capsule twice daily with food in divided doses or as directed by your healthcare practitioner. Duration of use: Consult a healthcare practitioner for use beyond 4 weeks.

⚠️ Warnings & Precautions

Cautions and warnings: Consult a healthcare practitioner prior to use if you are pregnant or breast-feeding; if you have a gastrointestinal lesion/ulcer; if you are taking anticoagulants/blood thinners, anti-inflammatories, or antibiotics; or if you are having surgery.

Known adverse reactions: Hypersensitivity/allergy has been known to occur; in which case, discontinue use.

Nausea, vomiting, and diarrhea have been known to occur; in which case, discontinue use and consult a healthcare practitioner.

Do not use if seal is broken.

Keep out of reach of children.

🧪 Formulation Notes

Quercetin SAP provides the bioflavonoid quercetin blended with the proteolytic enzyme bromelain to help promote healthy immune responses and respiratory tract function.

All ingredients listed for this product lot number have been tested by a third-party laboratory for identity, potency, and purity.

Contains no: Gluten, soy, wheat, corn, eggs, dairy, yeast, citrus, preservatives, artificial flavor or color, starch, or sugar.

This product is non-GMO and vegan friendly.

This product is non-GMO and vegan friendly.

Color, size and smell may vary from one lot to another.

Bioflavonoid

Additional Information

Store away from light.

NPN 80039352

Product Details

UPC / SKU 8 56711 00148 1
DSLD Entry Date 2023-03-22
Product Type Non-Nutrient/Non-Botanical
Form Capsule
Brand NFH
DSLD ID 273095
Data Updated 2026-04-11

Research Evidence

184 Research Sources
55 Avg Quality Score
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
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
B Dietary polyphenols and the risk of metabolic syndrome: a systematic review and meta-analysis
Meta Analysis BMC endocrine disorders 2024
B Quercetin and endurance exercise capacity: a systematic review and meta-analysis
Meta Analysis Medicine and science in sports and exercise 2011
B Dietary flavonoid intake and smoking-related cancer risk: a meta-analysis
Meta Analysis PloS one 2013
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
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
B Dietary flavonoid for preventing colorectal neoplasms.
Cochrane Review The Cochrane database of systematic reviews
B Flavonoids for treating venous leg ulcers.
Cochrane Review The Cochrane database of systematic reviews
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
View all evidence for Quercetin →

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