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Immune Defense

product on market Capsule Safrel Safety: 90/100
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

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

Quercetin, zinc, vitamin C, and vitamin D3 are researched for their roles in supporting immune function and antioxidant activity. There is strong evidence for the efficacy of vitamins C and D in immune health, though overall evidence coverage for this specific profile is limited. The formulation maintains a high safety score.

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

Alerts

Safety Alerts

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

Label

Product Label

Label for Immune Defense
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Capsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
75%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

500 mg
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)
100 mg (657% DV)
Exceeds UL by 2.5× (UL: 40 mg) 263 studies (A:6, B:134)
Vitamin C
1000 mg (1667% DV)
1500 IU (375% DV)
2.5× RDA — within safe limits 608 studies (A:16, B:251)

Other Ingredients

Cellulose Magnesium Stearate Silicon Dioxide
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

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

Metadata

Product Details

UPC / SKU8 50012 52081 8
DSLD Entry Date2024-09-25
Product TypeOther Combinations
FormCapsule
BrandSafrel
DSLD ID318395
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.