CJC-1295 / Ipamorelin Stack vs Sermorelin
A neutral, side-by-side comparison of two performance & growth hormone peptides — their mechanisms, dosing ranges, administration routes, side effects, and research evidence. For research and educational purposes only.
CJC-1295 / Ipamorelin Stack
The CJC-1295 (without DAC) and Ipamorelin combination is the most widely researched and community-validated growth hormone secretagogue stack. By pairing a GHRH analog with a selective GHRP, the two peptides act synergistically — producing GH pulses significantly larger than either compound alone, while maintaining a physiological pulse pattern and minimal side effects.
Full profileSermorelin
Sermorelin is a synthetic analog of the first 29 amino acids of GHRH (Growth Hormone-Releasing Hormone). It was FDA-approved for pediatric GH deficiency diagnosis and is widely used off-label in anti-aging and performance medicine. It stimulates pulsatile GH release more physiologically than exogenous GH.
Full profile| CJC-1295 / Ipamorelin Stack | Sermorelin | |
|---|---|---|
| Category | Performance & Growth Hormone | Performance & Growth Hormone |
| Also known as | CJC-1295 Ipamorelin, Mod GRF 1-29 Ipamorelin, CJC Ipa stack, CJC-1295 without DAC with Ipamorelin, GHRH GHRP combination | GHRH 1-29, GRF 1-29 NH2, Geref |
| Evidence | FDA-approved | FDA-approved |
| Dosing range | 100mcg each–300mcg each mcg, once daily before sleep (or 2–3x daily for more aggressive protocols) | 100mcg–500mcg mcg, once daily (before sleep) |
| Administration | Subcutaneous injection (both compounds), Administered together in the same injection | Subcutaneous injection |
| Key side effects | Water retention (mild, common), Tingling or numbness in hands/feet (transient), Headache (usually first 1–2 weeks), Fatigue or increased sleepiness (often desired at night dose) | Injection site redness, Headache, Flushing, Dizziness |
| Cited sources | 2 references | 1 reference |
Key differences
- Administration: CJC-1295 / Ipamorelin Stack — Subcutaneous injection (both compounds), Administered together in the same injection; Sermorelin — Subcutaneous injection.
- Frequency: CJC-1295 / Ipamorelin Stack is typically once daily before sleep (or 2–3x daily for more aggressive protocols); Sermorelin is once daily (before sleep).
- Research depth: this profile cites 2 sources for CJC-1295 / Ipamorelin Stack vs 1 for Sermorelin.
How each works
CJC-1295 / Ipamorelin Stack
CJC-1295 without DAC (Mod GRF 1-29) stimulates GHRH receptors on the pituitary, increasing the amplitude of GH pulses. Ipamorelin independently triggers GH release via the ghrelin receptor (GHS-R1a) with high selectivity — minimal cortisol, prolactin, or aldosterone co-elevation. The combination exploits two separate receptor pathways to produce synergistic GH output. Animal and human studies on each compound individually confirm GH and IGF-1 elevation. The combination is extrapolated from mechanistic research and is the most studied protocol in the peptide research community.
Sermorelin
Sermorelin works by binding pituitary GHRH receptors to stimulate GH secretion within the body's natural feedback loop. Unlike synthetic GH, it does not suppress endogenous production. Clinical studies show improved body composition, sleep quality, and IGF-1 levels in GH-deficient adults. Its short half-life (~10 min) means it requires daily dosing.
This comparison aggregates public research and structured profile data for informational purposes only. It is not medical advice and does not recommend either compound for human use. Consult a qualified healthcare provider before considering any peptide.