GPT and hepatitis B virus infection: Hsu et al. [17] performed a 1-year open-label pilot study to observe whether A. brasiliensis extract improves liver function in patients with hepatitis B. They gave the four enrolled patients A. brasiliensis extract of 1500 mg daily for 12 months and measured the level of aspartate aminotransferase (AST) and alanine aminotransferase (ALT).