Understand the source comparison
Ipamorelin Compare to Other Research Peptides: Full Comparison
The table below distills the functional differences that matter most in experimental design. Receptor selectivity, hormonal side effects, kinetic profile, and protocol suitability. Ipamorelin GHSR-1a (selective) None ~2 hours Low. No tachyphylaxis observed Iso
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- The table below distills the functional differences that matter most in experimental design. Receptor selectivity, hormonal side effects, kinetic profile, and protocol suitability.
- Ipamorelin
- GHSR-1a (selective)
- None
- ~2 hours
- Low. No tachyphylaxis observed
- Isolating GH pathway effects without cortisol or prolactin confounds; chronic protocols requiring stable response
- GHRP-2
- GHSR-1a + ACTH pathway
- 40–60% above baseline
- Minimal
- Low
- Studies where cortisol co-elevation is acceptable or examining HPA axis interaction with GH
- GHRP-6
- GHSR-1a + peripheral ghrelin receptors
- Moderate (20–30%)
- Moderate
- Appetite modulation research; cachexia models; gastroparesis studies
- Hexarelin
- GHSR-1a + broad cross-reactivity
- High (50–80%)
- High
- High. Tachyphylaxis within 2–4 weeks
- Short-term peak GH studies only; unsuitable for chronic protocols
- MK-677
- GHSR-1a (oral mimetic)
- Mild (10–15%)
- ~24 hours
- Chronic GH exposure models; oral administration required; sustained IGF-1 elevation