Taking vitamin C before drinking cannot be used to detoxify or prevent alcohol poisoning. Vitamin C in the human body can not accelerate the metabolism of alcohol or delay the absorption of alcohol, so it can not play a role in preventing drunkenness, or drunkenness after the role of alcohol. Alcohol is very harmful to the human body, alcohol can directly stimulate the gastrointestinal mucosa, resulting in damage to the gastric mucosa, nausea, vomiting, abdominal pain, abdominal distension and other symptoms, and some patients even have gastric hemorrhage, gastric ulcers and other serious gastrointestinal reactions. At the same time, alcohol in the process of metabolism to generate acetaldehyde, which is a carcinogen, can increase the risk of liver cancer, stomach cancer and other cancers. Alcohol also has a paralyzing effect on the central nervous system. It can cause headaches in mild cases and can lead to drowsiness or even coma in severe cases. So it is advisable to drink as little alcohol as possible, preferably none. If alcohol poisoning occurs, it is recommended to seek medical attention as soon as possible to receive treatment.