Taiwan entered an aging society in 2018 and is expected to transition into a super-aged society by 2025. With the increasing elderly population, age-related diseases pose urgent challenges to modern society. According to the Ministry of Health and Welfare's National Health Statistics in 2018, the prevalence of sarcopenia in Taiwan among individuals aged 65 and older is 23.6% for males and 18.6% for females. Sarcopenia, characterized by the loss of skeletal muscle mass due to aging, coupled with decreased muscle strength and/or reduced physical performance, poses a significant risk for disability, decreased quality of life, and increased mortality. Existing research indicates that appropriate nutrition and exercise can slow the onset of sarcopenia and even increase muscle mass to reverse its effects. This study is an interventional clinical trial recruiting middle-aged and elderly patients with sarcopenia or pre-sarcopenia. The intervention involves a combination of branched-chain amino acids and medium-chain triglyceride products, and the study aims to assess the effectiveness of this intervention for sarcopenia in middle-aged and elderly individuals.