GPT and hepatotoxicity: In the case of liver toxicity (Fig. 3b), AST, ALT and bilirubin were all correlated with each other (r = 0.82 AST to ALT; r = 0.41 AST to bilirubin, r = 0.38 ALT to bilirubin) and negatively correlated with serum glucose (r = −0.38 AST to glucose; r = −0.29 ALT to glucose; r = −0.2 bilirubin to glucose).