Quercetin, also known as Americanquercetin, is a biological flavonoid and a natural pigment found in all herbs, fruits, and vegetables. Flavonoids have anti-inflammatory and antioxidant protective effects in the body, and quercetin is currently one of the most powerful and effective herbal anti-inflammatory and antioxidant health products. In fact, quercetin has been proven to have preventive effects on various inflammatory and free radical damage diseases, including arthritis, allergies, macular degeneration, heart disease, gout, and various cancersSome research results have confirmed that quercetin from citrus fruits can reduce the growth rate of breast cancer cells by about 50%. In addition, animal based experiments also confirmed that quercetin can inhibit the growth of colon cancer, prostate cancer, breast cancer and lung cancer cells