Drinking yogurt for a day has little to do with weight change on that day. The change in our human body weight during the day has little to do with the amount of calories we eat that day, because the calorie consumption in a day is not enough to make a drastic change in body weight, and the change in weight over a short period of time is more of a change in the water content of the body as well as the weight of the food residue in the gastrointestinal tract, which has little to do with whether or not we drink yogurt. A one-day diet, even one day of just drinking yogurt, will not result in a significant weight loss in a substantial sense because the time period is too short. Yogurt is a dairy product after fermentation, each 100 grams of yogurt contains 70 calories, including 10 grams of carbohydrates, 3.2 grams of protein and 1.9 grams of fat. During the weight loss period, yogurt can drink moderately, but can not drink all day, which will easily lead to unbalanced dietary structure. Because the main calories of yogurt come from carbohydrates, which contain too much sugar, while the fiber content is almost none, the feeling of satiety is not strong. Other minerals, vitamins content is also not comprehensive. Therefore, it is not recommended to consume yogurt to lose weight, weight loss is the need for a reasonable diet, a variety of food with the full, and the need for gradual, not too hasty.