The CK, AST, and ALT enzymes are not the major problem, since these are known to be elevated in natural and drug-using bodybuilders (they are also markers of skeletal muscle damage). The GGT is the concern, since this enzyme, when associated with elevations of the former three enzymes, is correlated with possible liver damage. GGT can be elevated from alcohol use, so if you have used alcohol prior to the test, this may have artificially elevated it.
Have it checked just to be sure. In the mean-time, you can use the Milk Thistle (unless the Dr. can give you a GOOD reason why not to...and not some horseshit hypothesis), along with n-acetyl cysteine and phoshatidylcholine (or lecithin).