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A non-peptidic, potent, long-acting, orally-active, and selective agonist of the ghrelin receptor and a growth hormone secretagogue. MK-677 is studied for its ability to stimulate the release of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) without significantly affecting cortisol levels.
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In-depth findings from peer-reviewed preclinical and clinical studies
MK-677 (Ibutamoren) is an orally active, non-peptide growth hormone secretagogue that mimics the GH-stimulating action of the endogenous hormone ghrelin. It has been studied for its ability to increase lean body mass and bone mineral density.
MK-677 potently stimulates the ghrelin receptor, leading to a sustained, dose-dependent increase in serum levels of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) without significantly altering cortisol or prolactin levels.
Journal of Clinical Endocrinology & Metabolism (1998)In clinical studies involving healthy older adults, once-daily administration of MK-677 over 12 months resulted in significant increases in lean body mass, likely driven by enhanced GH and IGF-1 signaling.
Annals of Internal Medicine (2008)MK-677 administration increased markers of bone turnover in several studies, suggesting potential long-term benefits for bone mineral density and skeletal health in populations susceptible to bone loss.
Neuroendocrinology (1997)All findings above are sourced from peer-reviewed journals for educational reference. This product is for research purposes only — not for human consumption. Preclinical results may not translate to human outcomes.
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