A Study of PLH-2301 in Subjects With Sarcopenia

Inclusion Criteria: * Male or female subjects aged 65 years or older at the time of consent * Diagnosis of sarcopenia based on predefined diagnostic criteria * Short Physical Performance Battery (SPPB) total score within the protocol-defined range at screening * Stable body weight for at least 3 months prior to screening * Able to walk independently with or without assistive devices * Willing and able to comply with study procedures * Provided written informed consent prior to any study-specific procedures Exclusion Criteria: * History of clinically significant neuromuscular or musculoskeletal disorders that could affect muscle function * Uncontrolled cardiovascular, hepatic, renal, or metabolic disease * Use of medications known to affect muscle mass or function within the protocol-defined washout period * Participation in another interventional clinical trial within 3 months prior to screening * Any medical or psychiatric condition that, in the investigator's opinion, would interfere with study participation