In general, the carbohydrate needs of vegetables are calculated. Some root vegetables contain high carbohydrate, such as potato (17.2g/100g), groundnut (25.2g/100g), taro (34.6g/100g), etc. Therefore, the carbohydrate of vegetables in general needs to be calculated. Normal carbohydrate intake can be used in the formula total daily calories × 0.5 ÷ 4 to roughly calculate, about 50% to 60% of the total calories, specific can be adjusted according to their own needs. For people who want to lose weight to limit the intake of carbohydrates, it is recommended that the daily staple food is controlled within 300g; however, the control of calories must be gradual and progressive, and gradually reduce, do not suddenly drop or drop below the minimum safe level. The key to weight loss is to limit the intake of sugar and fat, while supplying adequate nutrients, such as essential amino acids, vitamins, minerals and so on.