Hi dr, my ggt 220. also alt high =140&alk phosphatase 140, i checked hep markers a, b&c it was negative also i don't drink alcohol, can this be frm fatty liver aline, im slight obese my bmi 30.5, what is possible cauuse(s)?

Many things: If you have a fatty liver, then liver enzymes may be slightly elevated. If there is no acute hepatic infection, it may be chronic, or related to a virus you didn't test for, such as ebv. A common cause of elevation of lft is drug reaction. If you take any medications or fat soluble vitamins, they could be the cause. Please see you doctor for proper assessment, evaluation & treatment.

Continue workup: Don't decide you have fatty liver until hemochromatosis and Wilson's have been ruled out. Both are treatable but will kill you if missed. I trust you're not taking any meds that might be doing this. Non-alcoholic fatty liver is largely genetic but you'd be doing yourself a huge favor by getting back into heavy-duty physical exercise like when you were a teen. This may be what your liver's asking.