Ipamorelin vs Sermorelin
Modern selective GHRP vs original GHRH analog.
| Attribute | Ipamorelin Selective GH secretagogue | Sermorelin GHRH(1-29) |
|---|---|---|
| Category | Muscle Growth & Performance | Muscle Growth & Performance |
| Best known for | Clean growth hormone pulse research | Endogenous GH-release research |
| In plain English | Researchers like ipamorelin because it gives a clean GH pulse without raising cortisol or prolactin — making it the most-discussed 'starter' GH peptide. | The original GH peptide. Sermorelin is shorter-acting and milder than CJC-1295 — researchers consider it the gentle introduction to GH peptide research. |
| How it works | Selectively activates the GHSR receptor, stimulating pulsatile growth hormone release from the pituitary. | Stimulates pituitary GH release by binding the GHRH receptor. |
| Researchers study | GH secretion, IGF-1 elevation, body composition, and sleep quality. | Age-related GH decline, body composition, sleep, and pediatric GH deficiency. |
| Internet discussion | The default beginner GH peptide on forums. Discussed for sleep, recovery, and lean gains. | Older audience favors it for being well-studied with a long history. |
Ipamorelin
Clean growth hormone pulse research
Researchers like ipamorelin because it gives a clean GH pulse without raising cortisol or prolactin — making it the most-discussed 'starter' GH peptide.
Selectively activates the GHSR receptor, stimulating pulsatile growth hormone release from the pituitary.
GH secretion, IGF-1 elevation, body composition, and sleep quality.
The default beginner GH peptide on forums. Discussed for sleep, recovery, and lean gains.
Ipamorelin is the cleanest of the GH secretagogues, producing GH pulses without significant cortisol or prolactin increase.
Sermorelin
Endogenous GH-release research
The original GH peptide. Sermorelin is shorter-acting and milder than CJC-1295 — researchers consider it the gentle introduction to GH peptide research.
Stimulates pituitary GH release by binding the GHRH receptor.
Age-related GH decline, body composition, sleep, and pediatric GH deficiency.
Older audience favors it for being well-studied with a long history.
Sermorelin is the original GHRH analog with the longest research history in GH peptide work.