Eating lettuce is not able to absorb fat in the body. Fat in the human body is mainly distributed in the subcutaneous tissue, around the internal organs and the abdominal omentum, lettuce by the digestive tract after digestion and absorption out of the body, and can not absorb fat. Fat is the body’s energy storage material, only by reducing calorie intake (the key is to limit the sugar and fat intake), or increase physical activity, so that the calorie intake is less than the consumption of calories, in order to consume the body’s adipose tissue. Although consuming lettuce cannot absorb body fat, lettuce is low in calories and rich in vitamins, and has some nutritional value. Diet should try to ensure nutritional balance, should not blindly pursue the health effects of certain ingredients, so as not to cause malnutrition and so on.