Fatty liver is quite common in the general population too: Wikipedia says "Approximately 20% of the United States population suffers from non-alcoholic fatty liver, and the prevalence of this condition is increasing."
I was diagnosed with fatty liver a few years ago. I also had slightly raised alanine transaminase (ALT), a liver enzyme which is a marker of non-alcoholic fatty liver.
Interestingly, when I went on a two month fast consuming only fruit juices and vegetable juices (during which I lost around 10 kg of weight), my ALT went back to normal, suggesting that the fast helps rid the liver of excess fat. Although there is some evidence suggesting that extreme fasting can make fatty liver worse in the long run, but this evidence is controversial, and may not be true.
There are studies that show that the following drugs/supplements can reduce fatty liver: Gynostemma pentaphyllum herb, oxymatrine, metformin, carnitine, berberine, inositol hexaphosphate.
More info on fatty liver:
Non-alcoholic fatty liver disease - Wikipedia, the free encyclopedia