At 29 years old, patients with moderate fatty liver disease can have their livers return to normal with aggressive diet and medication, and life expectancy is usually not affected. Moderate fatty liver is defined as a liver fat content of 10% to 25%, and common causes of this disease include alcohol consumption, obesity and diabetes. After removing the cause of the disease and controlling the primary disease, the histological changes of liver can be improved or even completely returned to normal, which will not affect the life expectancy. Commonly used treatments include diet and exercise therapy and medication, and commonly used medications include orlistat, metformin, statins and so on. It is recommended to actively cooperate with physicians, control diet and physical exercise in daily life and take medication on time, and go to the hospital regularly to check the condition of the liver. The medication should be used under the guidance of a professional physician, and should not be used on its own.