Oral Branched-chain Amino Acid Supplementation for Cirrhotic Patients With Sarcopenia

The goal of this clinical trial is to compare the nutritional parameters after 24-week supplementation of branched-chain amino acids in cirrhotic patients with low muscle mass. The main questions it aims to answer are: Is there the differences in the proportions of cirrhotic patients recovering from low muscle mass at 24 weeks among cirrhotic patients with low muscle mass who received BCAA supplementation and the placebo group? Is there the differences in the change of skeletal muscle index (SMI) measured by abdominal computed tomography (CT) at 24 weeks among cirrhotic patients with low muscle mass who received BCAA supplementation and the placebo group? Is there changes in other indices related to low muscle mass, including appendicular skeletal muscle mass (ASM), ASM/height\^2, handgrip strength, and 6-meter walk speed at 24 weeks among cirrhotic patients with low muscle mass who received BCAA supplementation and the placebo group? Is there changes in the liver frailty index (LFI), consisting of handgrip strength, chair stands, and balance, at 24 weeks among cirrhotic patients with low muscle mass who received BCAA supplementation and the placebo group? Is there changes in serum albumin levels, at 24 weeks among cirrhotic patients with low muscle mass who received BCAA supplementation and the placebo group? Is there changes in severity of liver disease, including the Model for End-Stage Liver Disease-Sodium Score (MELD-Na score), Child-Turcotte-Pugh score, and liver stiffness measured by transient elastography at 24 weeks among cirrhotic patients with low muscle mass who received BCAA supplementation and the placebo group? Participants will be asked to do following tasks: Participants will be asked for basic information such as age, place of residence, and contact phone number. Participants will undergo measurements of body weight, height, body mass index (BMI), muscle mass, and body fat content using a body composition analyzer, a total of 2 times (at the b