Most likely from the 6MP. Mine was elevated after 2 mos at 100mg, my GI dropped me back to 75mg. He also had the Prometheus Labs 6MP metabolites checked at 75mg - currently awaiting the results. He seemed unconcerned with my AST and ALT levels - both were about 2x my reference range. I also had a slightly lower WBC, which is all to be expected on 6MP. Oddly, I have not noticed a single bit of difference on 6MP and I started in June.
"What can't be changed must be endured" - unknown
DX with distal Crohn's colitis Oct 2007, predominantly in rectum
Colozal (750mg): 3 pills 3xdaily
Cortifoam - 1 nightly
6MP - currently at 100mg and waiting for response......