In many people’s impression, fatty liver is only fat people’s “patent”, thin people will not suffer from fatty liver. In fact, this is not true, this view is one-sided. Although obesity is one of the main causes of fatty liver, but thin people can also get fatty liver. In the 1960s, due to three years of natural disasters, food was extremely scarce, and many people lived on bark and grass, and many people suffered from malnutrition fatty liver after the disaster. Due to insufficient protein intake or malabsorption, lean people with long-term dieting, partial dieting or intestinal lesions suffer from severe calorie deficiency, which prevents the body from obtaining energy materials and oxidative enzymes needed for fat metabolism, so the body’s compensatory mechanism is mobilized to use and decompose its own fat and convert it into calories for the body’s needs, which causes a large amount of fatty acids to be released from the adipose tissue into the liver. This causes a large amount of fatty acids to be released from the adipose tissue into the liver, so that the liver, a “transit station”, cannot metabolize the fat due to the lack of enzymes necessary for fat metabolism, which eventually leads to the accumulation of fat in the liver and the formation of malnutrition fatty liver. Many people think that since eating too much fat, meat and sugar is easy to get fatty liver, it is better to eat all vegetarian, this concept is wrong. In fact, even if you don’t eat cholesterol-containing foods, your liver still processes and synthesizes cholesterol night and day. A complete vegetarian diet will affect your health due to insufficient protein intake. Therefore, a reasonable diet, balanced nutrition and moderate exercise are the only ways to prevent and treat fatty liver.