MK-677 (Ibutamoren) is an orally active growth hormone secretagogue investigated for its influence on growth hormone and insulin-like growth factor-1 pathways. Research has explored its potential effects on lean mass, recovery, sleep-related outcomes, bone metabolism, and broader metabolic processes. By stimulating endogenous growth hormone signaling, MK-677 continues to attract scientific interest in tissue repair, physical function, and age-related research. Its oral administration and prolonged activity have contributed to ongoing investigation across performance, wellness, and longevity-related research fields.