Quercetin

Quercetin is a flavonoid found in onions, apples, and green tea with anti-inflammatory and antioxidant properties. Laboratory and animal studies are extensive; human clinical evidence is more limited. The strongest human evidence is for allergy symptom reduction (quercetin inhibits histamine release from mast cells) and modest anti-inflammatory effects. Some evidence suggests it may support cardiovascular health by reducing blood pressure and LDL oxidation, but effect sizes in trials are small. Quercetin has low oral bioavailability, combination with bromelain or piperine improves absorption. Standard dosing is 500-1000mg daily. It is generally safe; drug interactions with blood thinners and immunosuppressants are worth checking with a prescriber.

Also known as: Sophoretin, Meletin