I hope you can enlighten me somewhat in regards to this. I have been told that I have HepC but my body cleared it. Had elevated blood ammonia, doc did liver biopsy but it only showed fatty liver, no other liver disease. Doc put me on Kristalose. I have had many gastro problems for two years. Was told I have IBS. What I can't understand is, what is making the Ammonia elevate if there is no liver disease. If I do not take the Kristalose, I become very fatigued and start having memory problems (not knowing where I am when I'm driving, unable to think of names, numbers,etc.) Can you give me any other things that can cause elevated ammonia. I am 55 yrs old, over weight, stomach looks pregnant, have lots of gas, and bouts of diarrhea even without the kristalose. Thank you for any info you can give me.