IGF-1 LR3 vs Ipamorelin
| Attribute | IGF-1 LR3 Long Arg3 IGF-1 | Ipamorelin Selective GH secretagogue |
|---|---|---|
| Category | Muscle Growth & Performance | Muscle Growth & Performance |
| Best known for | Direct anabolic IGF-1 research | Clean growth hormone pulse research |
| In plain English | While GH peptides ask the pituitary to release IGF-1 downstream, IGF-1 LR3 delivers the active molecule directly. | Researchers like ipamorelin because it gives a clean GH pulse without raising cortisol or prolactin — making it the most-discussed 'starter' GH peptide. |
| How it works | Binds IGF-1 receptors to drive cell growth, proliferation, and protein synthesis. | Selectively activates the GHSR receptor, stimulating pulsatile growth hormone release from the pituitary. |
| Researchers study | Muscle hypertrophy and hyperplasia, recovery, and tissue regeneration. | GH secretion, IGF-1 elevation, body composition, and sleep quality. |
| Internet discussion | Discussed at the intersection of peptides and traditional anabolic research. | The default beginner GH peptide on forums. Discussed for sleep, recovery, and lean gains. |
IGF-1 LR3
Direct anabolic IGF-1 research
While GH peptides ask the pituitary to release IGF-1 downstream, IGF-1 LR3 delivers the active molecule directly.
Binds IGF-1 receptors to drive cell growth, proliferation, and protein synthesis.
Muscle hypertrophy and hyperplasia, recovery, and tissue regeneration.
Discussed at the intersection of peptides and traditional anabolic research.
IGF-1 LR3 is a long-acting IGF-1 variant for direct anabolic research.
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.