Nonalcoholic fatty liver disease is one of the most common chronic liver diseases worldwide. Nonalcoholic steatohepatitis (NASH) is the active form of the disease which runs a progressive course and may result in liver cirrhosis and liver cancer. However, there is yet proven treatment for this disorder. In cell line and animal studies, we have shown that Phyllanthus urinaria can ameliorate NASH by reducing oxidative stress and lipid accumulation. Phyllanthus (Hepaguard) has been used widely by patients with chronic liver diseases, but the efficacy in NASH has not been confirmed in humans.