Hi Augustine, 
That is a good question. Usually we would recommend patients to avoid sugar-containing beverages such as bubble tea, soda, bottled juice. Excessive alcohol intake can also worsen the fatty liver.

Deep fried foods will need reduce as well. Fatty liver is often associated with diabetes, obesity, high cholesterol, gout. So awareness is needed to avoid foods that will worsen these associated conditions as well.

Some studies have suggested coffee is good for fatty liver, whereby those consistently taking coffee have reduced complications and mortality from fatty liver. Whilst coffee is good for you, remember to limit this to <3 cups per day. Of course, I would also suggest to drink coffee without sugar :)

On the side, weight loss is best management plan for fatty liver. Let it be exercises or some form of diet intervention. Weight loss of 7% or more has been shown to reduce liver inflammation from severe fatty liver. Exercise is the best option here because of the added benefits of cardiovascular improvement. 

Hope this helps