GPT and diabetes mellitus: Salmela et al showed that 17.0% patients with DM in their study had abnormal ALT.7 In a larger study, Erbey et al showed elevated ALT in 7.8% patients with DM compared to 3.8% patients without DM.8 Gonem et al have shown increased ALT, ALP, and bilirubin in 15.7, 10.4, and 37% patients with type 2 DM.