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What is Quercetin

Quercetin is a flavanol (flavonoid polyphenol) found in fruits and vegetables.

What are the proposed benefits

Possessing antioxidant, anti-inflammatory, anti-viral and mast cell stabilising properties, quercetin was able to inhibit the release of IL-6, TNF-α, tryptase and histamine (inflammatory mediators) in human mast cells. These cytokines are associated with the development of allergic 1 and non-allergic immune response.2

Preclinical evidence also suggests the ability to block the replication of rhinovirus, responsible for producing the common cold. 3

1. Kempuraj et al (2005) British Journal of Pharmacology, 145, pp. 934–944.
2. Kandere- Grzybowska et al (2006) British Journal of Pharmacology, 148, pp. 208–215.
3. Ganesan et al (2012) Antiviral Res. 94 (3): 258–271.