MK-677
Also known as: Ibutamoren, MK677, Ibutamoren Mesylate, L-163191, Nutrobal
MK-677 (ibutamoren) is a non-peptide, orally active agonist of the ghrelin receptor and a growth-hormone secretagogue.
Caliber Peptide Index tracks MK-677 across 4 research-peptide vendors, with the lowest listed price at $2.27/mg (30mg) at Modern Aminos as of 2026-06-03. Prices below are normalized to dollars per milligram so different vial sizes can be compared on an equal basis. MK-677 is sold by third-party vendors for research use only.
Research Applications
Studied in research on ghrelin-receptor signaling and growth-hormone/IGF-1 regulation.
Safety Considerations
Not an approved human therapeutic. Sold as a research chemical for laboratory use only — not for human consumption.
Sources
Available From 4 Vendors — Sorted by $/mg
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Frequently asked
- How many vendors sell MK-677?
- Caliber Peptide Index currently tracks 4 research peptide vendors listing MK-677.
- What is the lowest tracked price for MK-677?
- The lowest tracked price for MK-677 is $2.27/mg (30mg) at Modern Aminos. Prices are sorted by dollars per milligram so different vial sizes can be compared on an equal basis.
- How often are MK-677 prices updated?
- Vendor prices are refreshed by our automated scraper (most recent update: 2026-06-03). Always confirm the current price on the vendor's site before purchase.
Caliber Peptide Index is a directory. We do not test, score, or endorse any vendor. Prices listed are what each vendor publishes; verify on the vendor's site before purchase.
Products listed for research purposes only — not for human consumption. Wiki content is summarized from publicly available research literature and is not medical advice.