🟢 90/100

This product looks safe

  • Zinc: 100mg is 2.5× the Tolerable Upper Intake Level (40mg)
  • 75% of ingredients have research evidence
C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Zinc: 100mg is 2.5× the Tolerable Upper Intake Level (40mg)

Label Data

2 Capsule(s) Serving Size
30 Servings
Other Combinations Product Type
75% 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 (657% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 2.5× (UL: 40 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 100mg UL 40mg
Vitamin C
1000 mg (1667% DV)
1500 IU (375% DV)
✅ 2.5× RDA — within safe limits 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.0375mg UL 0.1mg

Other Ingredients

Cellulose Magnesium Stearate Silicon Dioxide

Label Claims — Verification

Nutrient
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 As a dietary supplement, take one (1) tablet daily preferrably with a meal or as directed by a healthcare professional.

Directions: Take one (2) capsules daily preferrably with a meal or as directed by a healthcare professional.

⚠️ Warnings & Precautions

Caution Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.

Stop use and contact a physician if adverse reactions occur. Do not use if seal under cap is broken or missing

🧪 Formulation Notes

Formulated by top physicians and immunologists Boosts immune system Supports respiratory health Supports cellular regeneration

4 in 1 Immune support

Quercetin 500mg Zinc 100mg Vitamin C 1000mg Vitamin D3 1500 IU

No: Milk, egg, fish, crustacean shellfish, tree nuts, peanuts, yeast, artificial colors, flavors or preservatives.

Additional Information

Storage Store at room temperature 59 Degrees - 86 Degrees F (15 Degrees - 30 Degrees C). Keep bottle tightly closed.

Questions or comments? Call: 1-844-384-3723

Made in the USA

Product Details

UPC / SKU 8 50012 52081 8
DSLD Entry Date 2024-09-25
Product Type Other Combinations
Form Capsule
Brand Safrel
DSLD ID 318395
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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