If iam 28 yrs old got fatty liver, not obese, not diabetic, no medecines, no alcohol, can I rule out hep if I tested neg hiv, hep a, b, c 1, 5 post exposure?

Fatty liver. If you have tested negative for viral hep recently, you can probably rule it out. There are other causes of nash (non-alcoholic steatohepatitis or fatty liver). Medications, autoimmune or inherited liver disease, rapid weight loss, and malnutrition. Make sure you rule these out as well.