Obesity is caused by eating meat for many years. The latest nutrition emphasizes eating less animal food and eating reasonably. Taking "low calorie" as the goal, it is suggested that vegetarianism control weight. High protein is very beneficial to human health, and low sugar is the key to correct body shape. This diet needs to control the intake of sugar. When losing weight, avoid eating animal viscera, aquatic shellfish, potato products, beef, wine, milk, chewing gum, pork, sugar, starch and so on. Vegetarian diet can maintain a proper body weight, maintain blood alkalinity, promote metabolism, and consume excessive fat and sugar accumulated in the body, thus achieving the purpose of losing weight. In short, overweight people are not only unsightly, but also inconvenient to move, work and live.