The functions of resveratrol are 1.Anti-tumor effect. Resveratrol is a natural anti-tumor chemoprophylaxis agent, which has good anti-cancer activity at the three stages of tumor initiation, promotion and expansion, and has an inhibitory effect on cancer cells at each stage. 2. Protective effect on cardiovascular and cerebrovascular diseases. Resveratrol can reduce myocardial ischemia-reperfusion injury, inhibit the formation of atherosclerosis and thrombosis, and play a protective role in cardiovascular and cerebrovascular diseases by anti-inflammatory, antioxidant and vasodilator. 3. Anti-oxidation, anti-free radical. Resveratrol can scavenge and inhibit the generation of free radicals, inhibit lipid peroxidation and regulate the activities of antioxidant enzymes. 4. The regulation of the immune system. Resveratrol can improve the phagocytosis rate of macrophages. Studies have found that resveratrol also has antiviral, anti-aging, anti-allergic, liver protection and other effects.