MK-677 12.5mg (ibutamoren) is supplied by Peptide Sciences as 60 capsules for research into orally active growth-hormone secretagogues.
Ibutamoren Research Overview
MK-677 is a non-peptide, orally available agonist of the ghrelin receptor GHS-R1a. Unlike GHRP peptides, it has a long half-life (about 24 hours), so it produces sustained increases in GH and IGF-1 in research subjects. It is studied in models of muscle wasting, bone density, sleep and appetite.
MK-677 12.5mg Specifications
| Property | Value |
|---|---|
| Compound | MK-677 (Ibutamoren mesylate) |
| Class | Non-peptide small-molecule ghrelin-receptor agonist (GHS-R1a) |
| Molecular weight | approximately 624.8 g/mol (mesylate salt) |
| Strength per capsule | 12.5 mg |
| Pack count | 60 capsules per bottle |
| Supplied form | Gelatin capsule, sealed bottle |
| Purity | greater than 99 percent (HPLC-MS verified) |
| Storage | Room temperature, sealed, dry; avoid direct sunlight and humidity |
Why a Capsule Format?
Pre-measured 12.5mg capsules make oral protocols simple and consistent. Compare with injectable GHRPs like ipamorelin to study oral versus peptide secretagogues.
Quality Control, COA and Shipping
Each lot is analysed by reverse-phase HPLC and identity-confirmed by mass spectrometry before release, and the batch-specific Certificate of Analysis is available for every order. Vials are lyophilised, sealed under inert conditions and shipped in insulated packaging from our US facility.
Related Research Compounds
Researchers working with MK-677 ibutamoren often compare results with these catalog compounds:
- Ipamorelin 5mg
- CJC-1295 no DAC 5mg (Mod GRF 1-29)
- CJC-1295 (No DAC), Ipamorelin 10mg (Blend)
- Tesamorelin 5mg
Explore the full Growth Hormone Peptides collection, browse the complete Peptide Sciences research peptide catalog, or review published literature on MK-677 ibutamoren in PubMed.
Research use only. This product is sold strictly for in-vitro laboratory research and development by qualified professionals. It is not for human or veterinary use, not a drug, food or cosmetic, and has not been evaluated by the FDA to diagnose, treat, cure or prevent any disease. Buyers must be 21+ and comply with all applicable laws.





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