Sermorelin
Growth Hormone
Compounding Only
Growth HormoneAnti-agingRecoverySleep
Sermorelin is a synthetic analog of the first 29 amino acids of endogenous GHRH, retaining full biological activity at the GHRH receptor. It was FDA approved (Geref) for GH deficiency in children from 1997 until its volu…
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MK-677
Growth Hormone & IGF
Not Approved
Growth HormoneOralNon-PeptideWADA ProhibitedPhase II
MK-677 (ibutamoren) is an orally active, non-peptide ghrelin receptor agonist (GHS-R1a) that stimulates GH release from the pituitary without requiring injection. It was developed by Merck and advanced through Phase II t…
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Stack Compatibility & Key Differences
Both are active research compounds. See individual pages for full protocol data.
Frequently Asked Questions
What is the difference between Sermorelin and MK-677?
Sermorelin: Sermorelin is a synthetic analog of the first 29 amino acids of endogenous GHRH, retaining full biological activity at the GHRH receptor. It was FDA approved (Geref) for GH deficiency in children from 1997 until its volu… MK-677: MK-677 (ibutamoren) is an orally active, non-peptide ghrelin receptor agonist (GHS-R1a) that stimulates GH release from the pituitary without requiring injection. It was developed by Merck and advanced through Phase II t…
Can you stack Sermorelin and MK-677?
Both are active research compounds. See individual pages for full protocol data.
Which has a longer half-life, Sermorelin or MK-677?
Sermorelin half-life: ~10–20 min. MK-677 half-life: ~24 hours.