It can be said for sure that diabetic patients cannot eat cake, because cake is high sugar, high fat and high salt food, which is not conducive to the stability of blood sugar of diabetic patients, diet therapy is the basic treatment for diabetic patients. Diabetic patients have to make their blood sugar and blood lipids reach the standard, and foods that make blood sugar rise must be forbidden when choosing foods, such as brown sugar, white sugar, icing sugar, glucose, maltose, honey, milk sugar, preserves, sweet drinks, ice cream, sweet cookies, cakes, sweet bread and sugar pastries, etc. All these foods will make blood sugar rise, so diabetic patients must pay attention not to eat them. Diabetic patients should choose foods with low sugar content and low glycemic index to eat, so that blood sugar will not fluctuate and will not cause blood sugar to rise, such as oats, buckwheat, black rice, millet, corn, red beans, mung beans, soybeans, etc.