My GGT level was very high (first reading "284") one week later (259). All my other enzymes were fine. I'm 50yr old, and in great shape. I've worked out all my life. I'm the same weight now as I was in high school (5'6" 160lbs). I may have one glass of wine every other day, and take one asprin a day. The only medical condition I have is high cholesterol. It's been as high as 365 and as low of 225. I do not take medication for it, just the one asprin. I watch what I eat and feel fine. How concerned should I be about my high GGT?