Does the fact that you blush easily after drinking alcohol mean that you don't drink enough?

　　Acetaldehyde has a certain stimulating effect and can dilate capillaries, causing the face to become red. The main component of wine is ethanol. After ethanol enters the human body, it generates acetaldehyde under the action of alcohol dehydrogenase, and acetaldehyde is degraded and metabolized under the action of acetaldehyde dehydrogenase. If acetaldehyde dehydrogenase is insufficient or has reduced activity, acetaldehyde cannot be effectively degraded, and acetaldehyde accumulates in the body, causing local blood vessels to dilate, which will appear as a blush on the face.

　　Some people don't blush after drinking, but they feel dizzy after just two sips. After two more sips, their face turns pale and they become drunk. This is because the alcohol dehydrogenase and acetaldehyde dehydrogenase in these people are insufficient or have reduced activity, resulting in the inability to effectively degrade ethanol. They can only rely on other inefficient oxidative enzyme systems in the liver to slowly degrade ethanol. The accumulation of large amounts of ethanol in the body in a short period of time can lead to drunkenness.

　　In other words, people who have both dehydrogenase enzymes and have high activity will drink a lot.； If there is only acetaldehyde dehydrogenase, and the acetaldehyde dehydrogenase is insufficient or the activity is reduced, the amount of alcohol will be relatively small, and drinking will make your face blush easily. However, if both dehydrogenases are absent or have insufficient activity, the amount of alcohol consumed will be very small, but it may not necessarily cause blushing.