His research has focused on clinical research of nonalcoholic fatty liver disease (NAFLD) and obesity- related gastrointestinal diseases with a specific focus in population-based study. In addition, his research was not included in gastroenterology and was expanded to cardiology, endocrinology, and neurology (sleep medicine).  He has experience with large epidemiologic cohort studies as well as clinical trials. Thus, his specific expertise in handling large datasets, experiences in clinical trials will be invaluable to the clinical research. This work has resulted in over 40 national presentations, and over 80 recently published manuscripts, including major journal such as Gastroenterology, Hepatology, Gut, Journal of Hepatology, American Journal of Gastroenterology (as the first and corresponding author). These publications have been cited over 2,000 times.