Source comparison
CJC-1295 Alternatives 2026 Best: Mechanism Comparison
Ipamorelin GHSR-1a (selective) ~2 hours Subcutaneous injection Minimal cortisol/prolactin impact Best for clean GH stimulation without appetite or stress hormone activation. Twice-daily dosing required MK-677 (Ibutamoren) GHSR-1a (non-selective) 4–6 hours Oral
This comparison does not assign a generated winner or score.
- Ipamorelin
- GHSR-1a (selective)
- ~2 hours
- Subcutaneous injection
- Minimal cortisol/prolactin impact
- Best for clean GH stimulation without appetite or stress hormone activation. Twice-daily dosing required
- MK-677 (Ibutamoren)
- GHSR-1a (non-selective)
- 4–6 hours
- Oral
- Appetite stimulation, mild insulin resistance
- Only orally bioavailable option. Useful when injection logistics are prohibitive, but appetite increase is unavoidable
- Hexarelin
- GHSR-1a (potent)
- 30–70 minutes
- Cortisol elevation (dose-dependent), desensitization risk
- Produces highest peak GH concentrations per dose but loses efficacy with continuous use. Better for acute studies than chronic protocols
- Tesamorelin
- GHRH receptor
- ~26 minutes
- None. Pure GHRH agonist
- FDA-approved for HIV lipodystrophy. Cleanest GHRH pathway activation with daily dosing, no ghrelin-mediated effects
- Sermorelin
- 8–12 minutes
- None. Mimics endogenous GHRH
- Preserves natural pulsatile GH release but requires multiple daily injections. Logistically intensive but physiologically accurate
- CJC-1295 (DAC)
- 6–8 days
- Potential receptor downregulation with sustained use
- Convenient weekly dosing but extended receptor occupancy may blunt GH pulses over time. Best for shorter study durations