There are 45 patients in this study. They are randomly divided into 3 groups which are whey protein isolate group, isolated soy protein group, placebo group. They will take the sample 1 sachet/day for 12 weeks. Muscle strength, muscle mass, physical performance, sarcopenia score, body weight, body mass index, protein, immunoglobulins, quality of life, liver function, kidney function, other laboratory value, and adverse effects are evaluated.
The objective of this study are to evaluate efficacy and safety of protein product in volunteers with sarcopenia.