GHRP-6 vs MK-677
Comparison of GHRP-6 (Moderate evidence) and MK-677 (Moderate evidence).
Last updated: February 12, 2026
GHRP-6
MK-677
Overview
GHRP-6 and MK-677 are both studied in the peptide research space.
GHRP-6: A first-generation growth hormone secretagogue that stimulates GH release through the ghrelin receptor.
MK-677: An orally-active, non-peptide growth hormone secretagogue that mimics ghrelin’s effects on GHS-R1a.
Evidence Comparison
| Aspect | GHRP-6 | MK-677 |
|---|---|---|
| Evidence Level | Moderate | Moderate |
| Human Studies | 12 | 18 |
| Preclinical Studies | 18 | 12 |
| Total Sources | 45 | 42 |
Key Differences
| Aspect | GHRP-6 | MK-677 |
|---|---|---|
| Category | Hormonal | Hormonal |
| Evidence Strength | Moderate | Moderate |
| Total Sources | 45 | 42 |
| Human Studies | 12 | 18 |
Summary
- GHRP-6: Moderate evidence with 45 total sources (12 human)
- MK-677: Moderate evidence with 42 total sources (18 human)
This comparison is for educational purposes only and is not medical advice. Consult a healthcare professional before making any decisions about peptide use.
View Full Dossiers
Stay Updated on Peptide Comparisons
Get notified when we publish new comparison dossiers and evidence reviews.
No spam. Unsubscribe anytime.
Disclaimer: This comparison is for educational purposes only and does not constitute medical advice. Individual responses to medications vary. Always consult a qualified healthcare provider before making treatment decisions.