GPT and hepatitis B virus infection: Extract of TCM formula Le-Cao-Shi (LCS) could suppress the production of HBsAg, HBeAg, and HBV-DNA in a duck hepatitis B model, and it might also lessen the levels of the aspartate aminotransferase (AST) and alanine aminotransferase (ALT) and improve the histological abnormalities in duck liver (Zhao et al., 2019).