What is MK-677?
MK-677 (ibutamoren) is an orally active, long-acting growth-hormone secretagogue. Although not a peptide itself, it is commonly grouped with GH peptides because it raises GH and IGF-1 by mimicking ghrelin.
Also known as: Ibutamoren, Ibutamoren mesylate
Commonly researched for
Research status
Investigated in human trials; not approved for these uses.
Important considerations
Can increase appetite, water retention and blood sugar. Technically a non-peptide secretagogue.