Quercetin is a plant pigment (flavonoid). Red wine, onions, green tea, apples, berries, Ginkgo biloba, St. John’s wort, and American elder are only few of the plants and foods that contain it. In particular, quercetin is abundant in buckwheat tea. As a medication, quercetin is widely used.
Quercetin is used for treating conditions of the heart and blood vessels including “hardening of the arteries” (atherosclerosis), high cholesterol, heart disease, and circulation problems. In addition to treating and preventing cancer and chronic prostate infections, it is also useful for diabetes, cataracts, hay fever, peptic ulcers, schizophrenia, inflammation, asthma, gout, viral infections, CFS, and chronic fatigue. In addition to its antioxidant properties, quercetin has been shown to enhance stamina and performance in athletics.