Growth Hormone Peptides in Plain Language
Growth hormone peptides are research compounds that interact with the somatotropic axis — the hormonal cascade that controls growth hormone production and its downstream effects. The system works like a relay:
- Step 1: The hypothalamus releases GHRH (growth hormone releasing hormone) → Sermorelin and Tesamorelin mimic this signal.
- Step 2: The pituitary gland releases GH in pulses → Ipamorelin amplifies these pulses through a different receptor.
- Step 3: GH tells the liver to produce IGF-1 → IGF1-LR3 is a modified version of this downstream effector.
- Step 4: GH and IGF-1 affect target tissues (muscle, bone, fat) → AOD-9604 isolates the fat-specific effect.
The OSYRIS GH category provides tools at every level of this cascade, allowing researchers to study GH biology from any angle.
What's in the OSYRIS GH Category
| Compound | Axis Level | What It Does |
|---|---|---|
| Sermorelin | Hypothalamic | Mimics GHRH (short-acting) |
| Tesamorelin | Hypothalamic | Mimics GHRH (DPP-IV resistant) |
| Ipamorelin | Pituitary | Selectively amplifies GH pulses |
| CJC/Ipamorelin Blend | Both | GHRH + GHRP synergy |
| IGF1-LR3 | Effector | Direct IGF-1 receptor activation |
| AOD-9604 | Fragment | Fat-specific GH fragment |
Where to Go Next
Choose Your Next Step
Move from the beginner overview into the category guide, collection page, or broader peptide primer depending on how deep you want to go next.
GH Axis Category Guide
Get the full view of GHRH, GHRP, IGF-1, and GH-fragment research across the somatotropic axis.
Growth Hormone Collection
Browse the full GH-axis catalog, from Sermorelin and Tesamorelin to Ipamorelin, IGF1-LR3, and AOD-9604.
What Are Research Peptides?
Start with the broad primer on what peptides are, how they are studied, and why RUO context matters.
Frequently Asked Questions
Questions About What Are Growth Hormone Peptides?
No. Secretagogues (Ipamorelin, Sermorelin) stimulate the pituitary to release GH naturally in pulses. HGH injections provide the hormone directly at a sustained level. Different patterns, different downstream effects.
A compound that stimulates a gland to release a hormone. GH secretagogues stimulate the pituitary gland to release growth hormone.
Because GH biology involves multiple levels (hypothalamus → pituitary → liver → tissues). Different compounds target different levels.
Selectivity. It releases GH without raising cortisol, prolactin, or aldosterone — side effects caused by older GH secretagogues.
Insulin-like Growth Factor 1 — the downstream effector of GH. The liver produces IGF-1 in response to GH, and IGF-1 mediates many of GH's tissue effects.
Tesamorelin (Egrifta) has current FDA approval for a specific indication. Sermorelin had FDA approval (now discontinued). Others are research compounds only.
Keep Following the Research Trail
Ipamorelin — The Selective Growth Hormone Secretagogue
Ipamorelin selective GHRP research. Ghrelin receptor pharmacology, pulsatile GH, body composition, bone density. PubMed cited.
Tesamorelin — The Stabilized GHRH With Clinical Proof
Tesamorelin research overview covering stabilized GHRH signaling, DPP-IV resistance, visceral fat data, and liver-fat research.
What Are Research Peptides?
What are research peptides? A plain-language introduction covering peptide biology, how they're made, categories, quality, and regulatory context.