CJC-1295 + Ipamorelin
The canonical growth hormone secretagogue blend pairing GHRH and ghrelin receptor pathways for synergistic pulsatile GH release research.
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What is CJC-1295 + Ipamorelin?
The CJC-1295 + Ipamorelin blend is the most studied and most widely used growth hormone secretagogue combination in research contexts. It pairs two distinct types of GH-releasing peptides: a GHRH analog (typically CJC-1295 without DAC, also known as Modified GRF 1-29) and a selective ghrelin receptor agonist (Ipamorelin). The combination exploits the well-documented synergistic effect that occurs when these two receptor pathways are activated simultaneously. The two peptides are not chemically combined into a single molecule but rather sold together as a paired research formulation.
The blend is notable in research because the synergistic effect produces growth hormone release exceeding the sum of either peptide alone — a true pharmacological synergy rather than simple additivity. Pituitary somatotrophs express both the GHRH receptor and the ghrelin receptor, and simultaneous activation produces robust GH release while preserving the natural pulsatile pattern of GH secretion. This blend has become the canonical research approach for studying combined GH secretagogue pharmacology, with extensive published literature on the synergistic mechanism and downstream effects on IGF-1, body composition, and recovery markers.
Mechanism of action
The CJC-1295 + Ipamorelin blend’s mechanisms of action have been investigated across multiple pathways:
- Dual receptor pathway activation: CJC-1295 activates the GHRH receptor through cAMP-dependent signaling while Ipamorelin activates the ghrelin receptor through Gq/phospholipase C signaling, with both pathways converging on growth hormone release.
- Functional somatostatin suppression: Ghrelin receptor activation by Ipamorelin reduces somatostatin tone, removing a brake on GH release and amplifying the response to concurrent GHRH receptor stimulation.
- Preserved pulsatile pharmacokinetics: Using the short-acting CJC-1295 no DAC rather than the DAC-modified version preserves the natural pulsatile pattern of GH release, producing a strong pulse that subsides over the following hours.
- Selectivity for clean GH release: Ipamorelin’s selectivity (minimal effects on cortisol, prolactin, or appetite) combined with CJC-1295’s GHRH-receptor-specific action produces a relatively clean GH release without the off-target effects of less selective combinations.
- Downstream IGF-1 elevation: Sustained dosing produces gradual elevations in insulin-like growth factor 1, the primary mediator of GH’s anabolic effects, with IGF-1 serving as a biomarker for monitoring blend effects.
These pathways are characterized in both preclinical models and limited human research.
Research applications
The CJC-1295 + Ipamorelin blend has been investigated across several research domains, with the most active areas including:
- Synergistic GH release research: The blend is widely used in research contexts requiring robust pulsatile GH release while preserving natural physiological patterns. The synergistic effect produces larger GH pulses than either component alone, providing a research tool for studying GH signaling at meaningful elevations.
- Body composition research: Studies have examined effects on lean mass, fat mass, and other body composition parameters consistent with elevated GH/IGF-1 signaling, with effects generally modest compared to exogenous GH administration but more physiological in pattern.
- Recovery and exercise research: Effects on recovery markers, sleep architecture (GH is closely tied to slow-wave sleep), and exercise-related parameters have been examined in research contexts where preservation of pulsatile GH patterns is preferred.
- Aging-related research: Age-related decline in GH/IGF-1 signaling is well-documented, and research has examined whether the blend can support GH axis function in aged populations through physiological rather than supraphysiological elevation.
- Comparative GH secretagogue research: The blend serves as a research reference for studying GH secretagogue pharmacology, with comparison to alternative combinations (CJC-1295 with DAC + Ipamorelin, CJC-1295 + GHRP-2, etc.) informing research design decisions.
This compound is intended for laboratory research use only. It has not been approved for human therapeutic use by any regulatory agency.
Storage & reconstitution
In lyophilized form, both CJC-1295 no DAC and Ipamorelin tolerate ambient temperatures during shipping but should be stored long-term at -20°C, protected from light. Properly stored lyophilized peptides remain stable for 24 months or longer. The two peptides in a blend have generally similar stability characteristics, making combined storage practical.
Once reconstituted with bacteriostatic water for injection, solutions should be stored refrigerated at 2-8°C and used within 28 days. Avoid repeated freeze-thaw cycles, which can degrade peptide structure and reduce activity.
Visual inspection should be performed before each use. The reconstituted solution should be clear and colorless. Reject any solution that appears cloudy, discolored, or contains visible particulate matter.
For step-by-step reconstitution calculations, see our reconstitution calculator.
For laboratory research use only. The compound described on this page is intended exclusively for in vitro research and laboratory experimentation by qualified researchers and is not for human or veterinary use. It is not a drug, food, dietary supplement, or cosmetic, and has not been approved by the FDA, Health Canada, EMA, or any other regulatory authority for the diagnosis, treatment, cure, mitigation, or prevention of any disease or medical condition. The information provided on this page is for educational and reference purposes only and does not constitute medical advice. By accessing this content you confirm that you are a qualified researcher purchasing for legitimate laboratory purposes.