Non-Alcoholic fatty liver disease, sometimes called NAFLD, is a condition in which fat infiltrates the liver tissue. This is usually asymptomatic and occurs over quite a long period of time.
There are two types of NAFLD:
Alcohol can also cause a similar type of fatty infiltration, but then it is not nonalcoholic fatty liver disease. Therefor this diagnosis can only be made in persons who consume none or very little alcohol.