Source comparison
Ipamorelin for Muscle Growth: Type Comparison
Ipamorelin Selective GHS-R1a agonist 2.5–3.5× baseline None 3× daily Cleanest profile for pure anabolic response. No hormonal interference GHRP-2 Non-selective ghrelin mimetic 3.0–4.5× baseline Moderate (30–40% increase) 2–3× daily Higher GH output but cortiso
This comparison does not assign a generated winner or score.
- Ipamorelin
- Selective GHS-R1a agonist
- 2.5–3.5× baseline
- None
- 3× daily
- Cleanest profile for pure anabolic response. No hormonal interference
- GHRP-2
- Non-selective ghrelin mimetic
- 3.0–4.5× baseline
- Moderate (30–40% increase)
- 2–3× daily
- Higher GH output but cortisol spike limits net anabolic effect
- GHRP-6
- Non-selective ghrelin mimetic + appetite stimulation
- 3.5–5.0× baseline
- Moderate to high
- Strongest GH response but appetite surge and cortisol make it impractical for recomposition
- Hexarelin
- GHS-R1a + CD36 receptor agonist
- 5.0–7.0× baseline
- High
- 1–2× daily maximum
- Highest GH pulse but rapid desensitization and cardiac receptor concerns limit duration
- CJC-1295 + Ipamorelin
- GHRH analog + GHS-R1a agonist
- 4.5–6.5× baseline
- 1–2× daily
- Synergistic stack. Amplifies ipamorelin's pulse without side effects
- Ipamorelin occupies a unique position: it produces a moderate but clean GH pulse with no metabolic interference. For researchers prioritizing muscle protein synthesis without appetite disruption or stress hormone elevation, it outperforms older peptides despite producing a lower absolute GH spike. When stacked with CJC-1295, it matches the GH output of GHRP-6 while maintaining a side-effect profile closer to baseline.