CJC-1295 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
CJC-1295 is a synthetic growth hormone-releasing hormone (GHRH) analog. It stimulates the pituitary gland to release growth hormone and is almost universally used in combination with a GHRP like Ipamorelin to produce a more physiological GH pulse.
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 | Sermorelin | |
|---|---|---|
| Category | Performance & Growth Hormone | Performance & Growth Hormone |
| Also known as | CJC-1295 DAC, CJC-1295 without DAC (Mod GRF 1-29), Modified GRF 1-29 | GHRH 1-29, GRF 1-29 NH2, Geref |
| Evidence | Research-stage | FDA-approved |
| Dosing range | 100mcg–300mcg mcg, once daily (Mod GRF) or twice weekly (DAC version) | 100mcg–500mcg mcg, once daily (before sleep) |
| Administration | Subcutaneous injection (most common), Intramuscular injection | Subcutaneous injection |
| Key side effects | Water retention (especially early in protocol), Tingling or numbness in extremities, Injection site redness, Flushing (transient, shortly after injection) | Injection site redness, Headache, Flushing, Dizziness |
| Cited sources | 2 references | 1 reference |
Key differences
- Evidence level differs: CJC-1295 is research-stage, while Sermorelin is fda-approved.
- Administration: CJC-1295 — Subcutaneous injection (most common), Intramuscular injection; Sermorelin — Subcutaneous injection.
- Frequency: CJC-1295 is typically once daily (Mod GRF) or twice weekly (DAC version); Sermorelin is once daily (before sleep).
- Research depth: this profile cites 2 sources for CJC-1295 vs 1 for Sermorelin.
Can you stack CJC-1295 and Sermorelin?
caution: Both are GHRH analogues — redundant mechanism
CJC-1295 and Sermorelin both act on the GHRH receptor. Combining them doesn't produce meaningful additional GH release and unnecessarily increases total peptide load. Choose one or the other. If you want complementary GH stimulation, pair either with Ipamorelin instead.
See the full compatibility matrixHow each works
CJC-1295
Studies have demonstrated that CJC-1295 significantly increases plasma GH and IGF-1 levels. The DAC (Drug Affinity Complex) version extends the half-life to approximately 6–8 days via albumin binding, while Mod GRF 1-29 has a much shorter half-life (~30 minutes) and is dosed more acutely. Research in adults with GH deficiency has shown improved body composition and metabolic markers.
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.