2. Flavonoids have many functions. It is a strong antioxidant, which can effectively remove oxygen free radicals in the body. For example, anthocyanins can inhibit the overflow of oily peroxides at all stages. This antioxidant effect can prevent cell degeneration and aging, and can also prevent the occurrence of cancer. Flavonoids can improve blood circulation and lower cholesterol. Flavonoids in Xiangtianguo also contain a PAF anticoagulant factor, which can greatly reduce the incidence of cardiovascular and cerebrovascular diseases and improve the symptoms of cardiovascular and cerebrovascular diseases. Flavonoids can inhibit the exudation of inflammatory biological enzymes, promote wound healing and relieve pain. Quercetin can be used for all kinds of allergies because of its strong antihistamine effect.