Non-alcoholic steatohepatitis (NASH) is an advanced form of non-alcoholic fatty liver disease (NAFLD). NAFLD is caused by buildup of fat in the liver. When this buildup causes inflammation and damage, it is known as NASH, which can lead to scarring of the liver. Scarring of the liver is a potentially life-threatening condition called cirrhosis. While there is no standard treatment for patients NASH, lifestyle changes have been shown to affect its progression. This may include losing weight, maintaining a healthy diet, or addressing underlying conditions such as hypothyroidism and diabetes.