MK677 is a non-peptide small molecule that acts as an agonist at the ghrelin receptor — the same receptor Ipamorelin works through — but where Ipamorelin is a peptide, MK677 was developed in the 1990s as an orally active compound, studied under the research name Ibutamoren. That oral stability is what distinguishes it in the growth-hormone-secretagogue literature, where it remains one of the most-cited compounds, commonly researched in growth-hormone-axis and body-composition models. Supplied as 60 capsules of 10mg per pack; not a peptide, so no reconstitution.