An orally active growth-hormone secretagogue studied in GH research.
MK-677 (ibutamoren) is an orally active growth-hormone secretagogue. Technically it is a non-peptide compound, but it is commonly grouped with GH-research peptides. It is sold strictly as a research material.
In animal and in-vitro models, researchers have examined this compound's relationship to:
These are areas of laboratory investigation, not established outcomes in people. For primary literature, see PubMed — MK-677 / ibutamoren research.
Part of the Growth / GH category. Related: Ipamorelin · CJC-1295 · Growth / GH hub
This compound is sold in the U.S. for research use only and is not approved for human consumption. The peptide compounding landscape shifted in 2026 — read our breakdown: The 2026 FDA Peptide Reclassification, Explained.
Each vendor below is scored on purity, third-party COAs, shipping, and reputation. Prices are starting points and change often. Every link is an affiliate link and is disclosed.
| Vendor | From | Purity | 3rd-party COA | Shipping | |
|---|---|---|---|---|---|
| ZestyRat ResearchTop pick | $— | 99%+ | ✓ Every batch | US domestic | View & buy |
| Vendor BMost tested | $— | 99%+ | ✓ Triple-verified | US domestic | View & buy |
| Vendor C | $— | 99%+ | ✓ On request | US domestic | View & buy |
Vendor rows and pricing populate as affiliate partnerships are approved. Products listed are for laboratory and research purposes only — not for human consumption.
No — MK-677 is technically a non-peptide compound, but it is studied alongside GH-secretagogue peptides and grouped here for that reason.
Look for batch-specific, third-party Certificates of Analysis (COAs), transparent purity testing, U.S. sourcing, and a real reputation across independent review platforms. Our vendor reviews check all of these.
No. We're an independent research and comparison resource. We link to vetted third-party vendors and disclose every affiliate relationship.
Last reviewed June 2026. By Shaun Tucker, B.A. Psychology, author of The Quiet Close.
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