Diabetic patients can eat leeks. Leeks are low in sugar content, low calorie, nutritious, rich in protein, fat, carbohydrates, dietary fiber, containing a large number of vitamins, carotene, calcium, phosphorus, iron, potassium, sodium, selenium, magnesium, etc., is a suitable vegetable for diabetic patients, and diabetic patients with constipation is better to use. Dietary therapy is the basic treatment for diabetic patients, in order to stabilize blood sugar, diabetic patients should choose low sugar content, low glycemic index of vegetables to eat, containing less than 4% of the sugar content of vegetables such as large and small bok choy, cabbage, spinach, leeks, tomatoes, pumpkin, winter squash, cucumber, zucchini, bitter gourd, carrots, celery and so on.