Hi I just did a blood test and my Gamma GT (37 Degrees) was 74.8 I do not drink or smoke and very healthy as I train to run marathons. I do drink a large does of protein shake everyday after my long runs. My fasting blood glucose is 5.68, se creatine 81.2, se cholesterol 3.70, high density lipoproteins 2.59, low density lipoproteins 1.367, se truglycerides 0.865 I am worried about this high Gamma GT of 74.8 u/l. Should I be concerned? And what could be the problem. My doctor told me to stop taking this whey protein shakes and eat healthy stuff ( no frying, butter etc).