Diet is to control weight by improving diet and drinking water, so as to achieve the purpose of losing weight. Compared with the diet pills and methods circulating in the market, dieting is undoubtedly a healthy and effective way to lose weight. Diet patterns used to lose weight include limited energy balanced diet, high protein balanced diet, light diet, ketogenic diet and low energy diet, Mediterranean diet, low fat diet, light diet, Askins diet and low energy balanced diet. At present, there are many diets on the market, including scientific methods and some diets without scientific basis. Therefore, when you need to lose weight, you'd better consult the nutrition department of a regular hospital or a regular weight loss institution to choose a healthy weight loss method.