Verified ComparisonLast updated: 22 April 2026
GHRP-6 vs MK-677
GHRP-6 is a peptide that requires injection; MK-677 is an orally active GH secretagogue mimic. This comparison examines route, kinetics, and research scope.
GHRP-6
GH Secretagogue
4.0/ 5
B+
MK-677 / Ibutamoren
GH Secretagogue
4.5/ 5
A
Editor's note
GHRP-6 is a true peptide with acute effects; MK-677 is an oral small molecule with sustained action.
| Criterion | GHRP-6 | MK-677 / Ibutamoren |
|---|---|---|
| Route of administration | Injectable peptide | Oral small molecule |
| Onset of action | Minutes | Gradual (hours) |
| Duration | Short-lived | Long half-life (24+ hrs) |
| GH pulse amplitude | Pronounced acute | Sustained chronic |
| Research depth | Preclinical-focused | Clinical trials conducted |
Frequently asked questions
MK-677 has clinical trial data; GHRP-6 is preclinical. Choice depends on research question.
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