“Don’t drink so much. You will damage your liver.” Ever heard anyone utter these words? Whenever we see someone drinking, we warn about their liver first. But do you know it is not only alcohol that can damage your liver? There is another type of disease too that can permanently damage the liver. Known as Non-alcoholic fatty liver disease, the major cause of it is obesity. We all know obesity has become an epidemic. It is not just obesity, which is a matter of concern, but rather how obesity tends to damage the body. Before we divulge further on how obesity is the cause of NAFLD and how weight loss surgery can help a person, let’s first tell you more about the disease itself. Four Stages of NAFLD There are four stages of NAFLD Simple Fatty Liver: Also known as steatosis, this is the primary stage of NAFLD. It is mainly a harmless build-up of fat in the liver cells.