The reason is as follows: 1. Whole wheat bread itself contains relatively low energy, which has the effect of avoiding excessive energy intake and has a very good effect on weight loss. 2. eating whole wheat bread can supplement the body with rich minerals, which constitute the raw materials for many enzymes and coenzymes in the body. 3, because it is rich in dietary fiber, can absorb water to expand the sense of satiety, which can avoid the intake of other excessive food and easy to cause negative energy balance, conducive to the decomposition of fat.