Usually, there is no clear numerical relationship between the daily calorie consumption and body weight, because the calorie consumption of human body is mainly determined by three aspects: basal metabolism, thermal effect of food and activity. Since each person consumes different calories from the above three aspects, it is impossible to accurately calculate how many pounds can be lost by consuming 300 kcal per day. However, according to the relationship between fat and calories, 1 gram of fat provides 9 kcal, which simply means that to lose 500 grams (one pound) of fat you need to consume 4500 kcal. According to this rule to calculate can be obtained, the daily consumption of 300 kcal can consume 51.4 grams of fat. But this is only a projection, consuming about 51.4 grams of fat does not necessarily mean that you can lose so much weight. According to each person’s physique, the effect of weight loss varies, and weight loss is a gradual process, not in order to lose weight in a short period of time, excessive exercise to lose weight, excessive exercise will also cause a series of adverse effects on the body. In a reasonable exercise to consume calories to achieve the purpose of weight loss, but also should be properly adjusted to the structure of the diet, as well as reasonable control of dietary intake, do not overeat, so that the effect of weight loss will be better and safer.