Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia. Hyperglycemia is caused by a defect in insulin secretion or impairment of its biological action, or both. Prolonged hyperglycemia in diabetes can lead to chronic damage, dysfunction of various tissues, especially of the eyes, kidneys, heart, blood vessels, and nerves. The most important thing is to control the diet of diabetes, high glycemic index of food is best to eat less or not, that glycemic index is what, which food glycemic index is high? 1, sweet potatoes because of the sweet taste, rich in nutrition, sweet potatoes have been loved by people, at the same time, the latest research also shows that sweet potatoes have a certain anti-cancer effect, but can not be ignored is that the sugar content of sweet potatoes is 27.7%, its glycemic index is also high, therefore, high blood sugar patients are best not to eat sweet potatoes. Really want to eat must correspondingly reduce the amount of staple foods, and to choose white skin sweet potatoes. 2, honey honey is mainly composed of glucose, fructose, such as monosaccharides, can be directly absorbed by the body, so the blood sugar rises quickly, but this is fatal for diabetics, therefore, diabetics should be prohibited from eating honey. But hyperglycemic patients can eat the right amount of royal jelly, not only more nutritious, royal jelly also contains insulin-like, beneficial to hyperglycemic patients. 3, persimmons persimmons are rich in sucrose, glucose, fructose, that is, high sugar content, and are also monosaccharides and disaccharides, the most unsuitable for hyperglycemic patients. Although, the taste of persimmon is salivating, but high blood sugar patients for their own health, please control their own mouth, family members should also carry out appropriate supervision. 4.Ice cream The biggest temptation for hyperglycemia patients in the hot summer is ice cream. Ice cream is not very high in calories, but the terrible thing is the extremely high sugar content, and hyperglycemic patients should avoid it. 5, candied fruit The sweet and sour candied fruit is suitable for both young and old: but for hyperglycemic patients, this should definitely be classified as a no-go area, candied fruit is made of sugar, and therefore contains very high sugar content, at the same time, also contains other substances harmful to the body, therefore, hyperglycemic people, especially some female patients who love to snack, please be sure to stay away from candied fruit, and candied fruit similar to jam. 6, beer Often heard that alcohol is not good for blood sugar control, so some hyperglycemic patients, holding a fluke, think that drinking beer with low concentration of alcohol, should not be too big a problem, but the fact is not. The maltose content in beer is high, and as a monosaccharide, it is much more dangerous for hyperglycemic patients. In short, whether or not diabetes diet should adhere to the principle of less oil, less salt and less sugar, while achieving a balanced nutrition and reducing high-calorie diet, blood sugar will not fluctuate too much because of diet, and medication and other treatment modalities can have maximum effect.