Dihydromyricetin is the extract of Ampelopsis grossedentata. It is the main active component of Ampelopsis grossedentata. This kind of substance has many peculiar effects, such as scavenging free radicals, antioxidation, antithrombotic, antitumor, anti-inflammatory and so on. Dihydromyricetin is a special flavone compound, which can relieve alcoholism, prevent alcoholic liver, fatty liver, inhibit the deterioration of liver cells It has special effects on reducing the incidence rate of liver cancer, antihypertensive, inhibiting platelet aggregation and thrombosis in vivo, lowering blood lipid and blood sugar level, improving SOD activity and protecting liver.