Red wine is not recommended for diabetics because it contains more sugar, which can cause an increase in blood sugar. The main components of red wine are grape juice and alcohol. Dry wines, i.e. red wines, have a low sugar content of about 4g/l, while sweet wines can have a sugar content of 45g/l or more. Alcohol in red wine also produces high calories, with 1g of alcohol producing about 7kcal. Therefore, drinking wine can cause an increase in blood sugar. Therefore, diabetic patients are not recommended to drink alcohol, including red wine. At the same time, diabetic patients should pay attention to diet control, time and quantity, appropriate exercise, physical exercise and so on. For more knowledge about food health, you can consult a professional nutritionist and eat reasonably under the guidance of a doctor.