Quercetin 500
Backed by 45 studiesOverall grade based on research across 2 ingredients.
57out of 100Grade C
Research evidence score
Weighed against 45 published studies · led by Vitamin C
Ingredient breakdown
C
Vitamin CSupports immune function
Research direction: Leans supportiveEvidence: 40 studiesDose: 25 mgEvidence strength: Moderate - supportive but mixed
Effects of Citrus Fruit Juices and Their Bioactive Components on Inflammation and Immunity: A Narrative Review (2021)Does Evidence Exist to Blunt Inflammatory Response by Nutraceutical Supplementation during COVID-19 Pandemic? An Overview of Systematic Reviews of Vitamin D, Vitamin C, Melatonin, and Zinc (2021)The effect of Vitamin C and Zn supplementation on the immune system and clinical outcomes in COVID-19 patients (2022)
C
Quercetin Phospholipid ComplexSupports blend function
Research direction: InconclusiveEvidence: 5 studiesDose: 25 mgEvidence strength: Moderate - supportive but mixed
Preparation, therapeutic evaluation and pharmacokinetic study of quercetin-phospholipid complex in rats (2017)X-ray structure of a carpet-like antimicrobial defensin–phospholipid membrane disruption complex (2018)Comparative pharmacokinetics of different coenzyme Q₁₀ formulations in Wistar rats: Superior bioavailability of phospholipid complex and lipid-encapsulated delivery systems (2025)
This summary describes only the ingredients and the research behind them — it is not a judgment of the product or its marketing. Grades reflect the weight of published evidence cross-referenced against 350M+ research papers. How we grade →
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