Chestnuts are high in calories. Every 100 grams of cooked chestnuts contain about 185 calories and about 60 grams of carbohydrates, so chestnuts belong to high-calorie and high-sugar food. 100g of boiled potatoes is 81 calories, 100 sweet potato calories 87 calories, one hundred grams of cooked rice calories for about 120 calories. Through the comparison of chestnut belongs to the very high calorie food, calories higher than a lot of staple food, eat more easy to get fat, very unfavorable to lose weight. At the same time chestnut contains some dietary fiber, its glycemic index of 60, belongs to the glycemic index food, but because of its carbohydrate content is too high, the glycemic load, so diabetic patients should eat less.