Non-alcoholic or metabolic fatty liver disease (hereafter referred to as fatty liver) is very common among adults in Hong Kong. Data shows that the prevalence rate among adults is 27 to 42 percent, particularly among men and individuals over 40. Most patients show no obvious symptoms in the early stages. However, accumulated over years, it weakens liver function, leading to symptoms like fatigue, discomfort in the upper right abdomen, loss of appetite, and indigestion.