Quercetin is widely found in apple skins, onion peels, peppers, certain berries, tea, and red wine. Dozens of recent studies have focused on quercetin as an extract added to a supplement and are showing promising results in athletic performance, immune system support and a variety of areas that could ultimately be viewed as preventative or therapeutic in addressing various health conditions.
Quercetin, also known as quercetin, quercetin, is soluble in glacial acetic acid, yellow in alkaline solution, almost insoluble in water, and bitter in alcohol solution. As a medicine, it has good expectorant and antitussive effects and has a certain antiasthmatic effect. In addition, quercetin powder also lowers blood pressure, enhances capillary resistance, reduces capillary fragility, lowers blood lipids, dilatation of coronary arteries, and increases coronary blood flow. Quercetin powder is used for the treatment of chronic bronchitis. Quercetin is also has adjuvant therapy for patients with coronary heart disease and hypertension.