GPT and COVID-19: Biochemically, patients demonstrate high concentrations of C-reactive protein (CRP) and less common elevations in liver enzymes (aspartate aminotransferase and alanine aminotransferase), creatine kinase (CK) and D-dimer.4 Furthermore, in a systematic analysis of 11 articles, Lippi and Plebani5 have documented laboratory abnormalities reported in cases of COVID-19.