🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 20% of ingredients have research evidence
B Label Compliance Grade

Product Label

📸

Have a supplement label? Find it here.

Upload a photo of any supplement label to search our database of 92,312 products.

Label Data

1 Capsule(s) Serving Size
60 Servings
Other Combinations Product Type
20% Evidence Coverage

Supplement Facts — Evidence Check

200 mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 200mg
Stinging Nettle root extract
150 mg
50 mg
📊 Market median: 200.0mg (136 products) 📚 3 studies — no high-quality reviews
This product: 50mg
Butterbur Root Extract
50 mg
Bioperine Black Pepper Fruit Extract
2 mg

Other Ingredients

Hypromellose Rice Bran, Powder

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

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

Suggested Use: Take one (1) capsule one to three times daily or as directed by a physician.

⚠️ Warnings & Precautions

Caution: Keep out of reach of children.

Pregnant or lactating women and those undergoing treatment for a medical condition should consult a physician before taking this supplement.

Do not use if outer seal is missing or damaged.

🧪 Formulation Notes

Made with non-GMO ingredients

Dietary Supplement with Quercetin, Butterbur & Nettle Root

Supports healthy histamine levels Helps promote seasonal comfort Supports sinus and nasal health

Additional Information

Store in a dry, cool place.

Manufactured in the USA cGMP Certified Manufacturing

Product Details

UPC / SKU 0 91037 75859 0
DSLD Entry Date 2022-10-24
Product Type Other Combinations
Form Capsule
Brand LES Labs
DSLD ID 276529
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 →

Compare Similar Products

View all Quercetin products →