Due to the prevalence of alcohol culture, you often encounter problems with drinking. Some people are red in the face after drinking alcohol, while some people still do not change their face after several glasses of white wine, why? –Related to the metabolism of alcohol. The common component of beer and liquor is alcohol, chemically known as ethanol. After drinking alcohol, ethanol enters the body and becomes acetaldehyde by removing two hydrogen atoms under the action of ethanol dehydrogenase, and acetaldehyde is transformed into acetic acid under the action of acetaldehyde dehydrogenase, and finally acetic acid is then converted into carbon dioxide, water and fat. Ethanol metabolism in the body after the energy produced mainly in the form of fat stored, which is the reason why a large number of drinkers will appear beer belly. If a person lacks acetaldehyde dehydrogenase, then drinking alcohol will lead to excess acetaldehyde in the body, and acetaldehyde can dilate blood vessels, which makes people red, dizzy, unsteady gait, so a lack of acetaldehyde dehydrogenase in the body of people drinking alcohol will soon appear red and easy to get drunk, on the contrary, the body rich in acetaldehyde dehydrogenase is not easy to appear vasodilatation, and a thousand glasses, heroic sea. American scholar Philip.J.BlooKs said that East Asians blush after drinking because of their genetic defect of ALDH2, these people not only can’t drink, but also increase the risk of esophageal cancer if they drink forcibly and their alcohol consumption is too large. There are also research results that show that people with ALDH2 genetic defects who drink a lot of alcohol, especially high alcohol, have an increased risk of alcoholic liver disease and liver cancer. L. White found that some genes on chromosome 15 are closely related to the degree of drunkenness after drinking, and more interestingly, the drinking gene can be passed on from generation to generation.