You can go a month without added sugar, but you must eat carbohydrates and other “sugar” from staple foods, otherwise it will lead to insufficient energy supply, malnutrition, and affect athletic performance. If you don’t eat products containing added sugar for a month, such as candies, desserts and other processed foods, this practice is more recommended, especially for people with diabetes, because these processed foods can easily lead to excessive sugar intake, increasing the risk of obesity. But if it is not eat any food containing sugar, such as some staple foods, etc., is not conducive to maintaining the normal physiological activities of the body. Sugar is the main source of energy to maintain the basic physiological activities of the body. Most of the calories produced by the body are supplied by sugar nutrients. On the one hand, sugars can be absorbed and utilized by the body, and they can also be temporarily stored in the form of glycogen by the muscles as well as the liver. Failure to eat sugar can lead to inadequate energy supply or even malnutrition. Sugar also assists in the synthesis of proteins in the body and maintains normal fat metabolism. When doing high-intensity exercise, the stored glycogen is released to play a role in supporting the body. The Dietary Guidelines for Chinese Residents (2016) suggests that adults should consume no more than 50g of added sugar a day, preferably kept below 25g. We ensure that the normal diet of three meals, staple foods, vegetables, fruits and meat in the sugar content has been able to meet the needs of people, if we also eat some additional processed foods with added refined sugar, it is easy to make the sugar over the limit, bringing harm to the body.