Dieting to lose weight may lead to weight rebound, the body lacks vitamins, proteins, induced gallbladder, stomach diseases and so on. 1. Weight rebound: dieting to lose weight will lead to nutrients can not be timely supply, a short period of time can be achieved to lose weight, but after resuming normal intake of food, the weight is more likely to rebound, affecting the health of the body. 2. Lack of vitamins: the body’s intake of nutrients is correspondingly reduced when dieting. The lack of vitamins will affect the synthesis of collagen, resulting in a lack of skin elasticity and luster, resulting in decreased resistance and increased risk of disease. 3. Insufficient intake of high-quality protein: the human body is composed of cells, the main component of the cells is protein, dieting weight loss after the human body intake of protein is reduced, affecting the body’s function, easy to induce disease. 4. Induce gallbladder and stomach diseases: after dieting to lose weight, the stomach and intestines do not have food for digestion, bile is over-concentrated, and the mucous membrane of the stomach is stimulated by gastric acid will induce gallbladder and gastrointestinal diseases. Therefore, dieting to lose weight is not scientific, it is recommended to ensure that three meals a day regular, appropriate exercise to achieve the purpose of weight loss.