American medical scientists have pointed out through research that eating more fruits and vegetables helps to lose weight. Because meat food can easily become fat, stored in the human body and make people obese. Protein or carbohydrates in fruits and vegetables are not easy to be converted into fat, especially green vegetables without sugar are more effective for losing weight, because it will make the human body consume more calories than the fruits and vegetables that a person eats. Vegetable and fruit meal refers to eating mainly vegetables and fruits, completely or basically not eating cereals or meat, which is used to greatly reduce the total calorie and fat intake of the meal.