The investigators conduct a randomized, double-blind, placebo-controlled study to investigate the effects of the fermented oyster extract on muscle strength, muscle mass, and muscle function in healthy adults for 12 weeks.

Previous studies have indicated that fermented oyster extract may have the ability to prevent skeletal muscle atrophy. Therefore, the investigators conduct a randomized, double-blind, placebo-controlled study to investigate the effects of the fermented oyster extract on muscle strength, muscle mass, and muscle function in healthy adults; the safety of the compound are also evaluate. The Investigators examine the peak torque/body weight at 60°/s knee extension, handgrip strength, skeletal muscle mass, physical performance, and metabolic parameters at baseline, as well as after 4 and 12 weeks of intervention. Fifty-four healthy adults were administered either 1,200 mg of fermented oyster extract or a placebo each day for 12 weeks;

Inclusion Criteria:

• <110% of the standard lean body mass as measured using the body composition analyzer
• Body-mass index (BMI) ranging from 18.5 to 30.0 kg/m2

Exclusion Criteria:

• Abnormal liver or renal function (i.e., serum aminotransferase activity > 60 IU/L and serum creatinine concentrations > 1.2 mg/dL)
• Diabetes (diagnosed clinically or fasting glucose level > 126 mg/dL)
• History of fracture during the previous year
• Uncontrolled hypertension
• History of serious cardiac disease such as angina or myocardial infarction
• History of gastrectomy
• History of medication for psychiatric disease
• Administration of oriental medicine including herbs within the past 4 weeks Evidence of relatively high skeletal mass (more than 110% of the standard lean body mass as measured using the body composition analyzer