Q

Quercetin
A flavonoid that is widely distributed in the plant kingdom.

Flavonoids are naturally occurring antioxidants found in many fruits, vegetables, and other plants. Quercetin has antihistamine, anti-inflammatory, and anticancer properties. It also stabilizes cell membranes and reduces capillary fragility.

Quinine
An alkaloid drug derived from the cinchona plant used to treat malaria.

Quinsy
Acute inflammation of the tonsils and surrounding tissue, often leading to the formation of an abscess.