quercetin

noun

quer·​ce·​tin ˈkwər-sə-tən 

: a yellow crystalline pigment C₁₅H₁₀O₇ occurring usually in the form of glycosides in various plants

Examples of quercetin in a Sentence

Recent Examples on the Web

Foods rich in antioxidants and anti-inflammatory compounds like omega-3s and quercetin may be helpful in reducing allergy symptoms. —Zia Sherrell, Health, 22 Apr. 2026

Chia Seeds Chia seeds are rich in soluble fiber and quercetin, an antioxidant that may support heart health by reducing inflammation. —Abby Norman, Verywell Health, 21 Apr. 2026

They are made from natural ingredients such as MSM, yellow dock root, quercetin and Omega fatty acids that promote healthy skin and coat and reduce itching. —Bestreviews, Mercury News, 1 Apr. 2026

This high-quality formula from Thorne pairs trans-resveratrol and quercetin phytosomes with NR, a precursor to NAD+ that can stimulate NAD+ production, to help support cellular energy and aging pathways. —Brianna Peters, Vogue, 2 Feb. 2026

Word History

Etymology

International Scientific Vocabulary, from Latin quercetum oak forest, from quercus oak — more at fir

First Known Use

1856, in the meaning defined above

Medical Definition

quercetin

noun

quer·​ce·​tin ˈkwər-sət-ən 

: a yellow crystalline pigment C₁₅H₁₀O₇ occurring usually in the form of glycosides in various plants