Raisin itself contains high sugar content, eating too much is easy to cause high blood sugar, obesity, dental damage and so on. 1. High blood sugar: every 100 grams of raisins contain 341 calories, of which 83.4 grams of carbohydrates, 2.5 grams of protein, 0.4 grams of fat. If people who are in the pre-diabetic or diabetic stage eat too many raisins with high sugar content, it is easy to cause blood sugar to rise, resulting in aggravation of symptoms. 2. Obesity: due to the high sugar content of raisins, if you eat too much, it is easy to cause obesity. 3. Tooth damage: raisins have a lot of sugar, but also easy to stick teeth, if you do not do a good job of oral cleaning, it is easy to cause tooth decay. It can be seen that you can not eat too much raisins, while in diabetes or pre-diabetes people should avoid eating raisins and other foods with high sugar content.