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Quercetin: what 500 mg actually does

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By NSW Editorial Team · Reviewed by the NSW Editorial Board · Updated

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Quick answer

Quercetin is a flavonoid found in onions, apples, and capers. Standard supplement dose is 500 mg, taken twice daily with food. Co-administration with bromelain improves absorption by approximately 40%. Quercetin has poor water solubility, which limits oral bioavailability without a delivery system.

Mechanism

Stabilizes mast cells, modulates NF-kB signaling, scavenges free radicals.

Dosing strategies

Citations

FAQ

Educational, not medical. These statements have not been evaluated by the Food and Drug Administration. This content is for educational purposes only and is not a substitute for medical advice from a qualified healthcare provider. Not intended to diagnose, treat, cure, or prevent any disease.