Beer does not have the effect of lowering blood glucose. Generally, beer enters the human body and causes an increase in blood glucose within a certain period of time. There is no clinical evidence that beer has the efficacy of lowering blood sugar. On the other hand, long-term alcoholism may damage liver function, and diabetic patients need to protect liver and kidney function, so beer is harmful to diabetic patients, and it is not recommended that diabetic patients drink a lot of alcohol for a long time. The main components of beer are alcohol and water, and the content of carbohydrates, fats and proteins is very small. Therefore, beer is a low glycemic index food, and the intake of a small amount of beer will not lead to excessive elevation of blood glucose in healthy people. In addition, any food that enters the body will lead to higher blood glucose than when fasting, but in healthy people, the value of elevated blood glucose after the food enters the body is within the normal range, while diabetic patients may lead to a significant increase in blood glucose after eating, so the same person, the intake of a large amount of beer generally leads to higher blood glucose than when fasting. Specific dietary contraindications and precautions are recommended for patients to consult a medical professional and dietitian.