Alt blood test result is 81, the ast 39. i'm not a drinker, but am 50 pounds overweight with most of it in the belly. is nafld probably the reason?

Exclude other causes: I assume you are well.There are many causes of impaired liver function I note you are a nondrinker so that removes a common cause. Fifty pounds overweight, possible NAFLD. Do you have diabetes? Are you taking medicines? Have you had Hepatitis B and C excluded? Hemochromatosis is a genetic disorder found in people of Northern European origin and Wilson's disease is rare cause. Get tested.