Red wine is mostly made from grapes, and the alcohol and tannin contained in it can inhibit the growth of bacteria. Vitamins C, E, carotene, aldose, etc. contained in it all have antioxidant functions, and can effectively prevent human aging, cataracts, immune disorders, atherosclerosis, cardiovascular and cerebrovascular diseases and cancer, especially phenols released from grape skins and seeds in red wine, such as tannins, red pigments, flavanols, etc. A British expert has done a large sample experiment, which proves that this result is correct. Therefore, moderate drinking of red wine is very helpful to health, but excessive drinking is absolutely harmful to health.