Research Profile: Ipamorelin
Overview
Ipamorelin is a synthetic pentapeptide and a selective agonist of the ghrelin receptor (GHSR-1a). It is widely regarded as one of the most stable and selective Growth Hormone Secretagogues. Its primary role in research is to stimulate the pituitary gland to release endogenous growth hormone (GH) in a controlled, pulsatile manner.
Mechanism of Action
- Receptor Selectivity: Ipamorelin binds specifically to the ghrelin receptor. While it mimics the effect of ghrelin, it does so in a way that only triggers the growth hormone pathway.
- The “Safety” Profile: Earlier secretagogues (like GHRP-6 or GHRP-2) are known to also stimulate the release of cortisol, prolactin, and ghrelin (which causes extreme hunger). Ipamorelin is unique because it effectively stimulates GH release while having a negligible impact on cortisol and prolactin levels, even at higher doses.
- Synergy: It is almost universally paired with a GHRH analog (like CJC-1295 No-DAC) in research protocols. The GHRH analog increases the number of available GH-releasing cells, while Ipamorelin provides the pulse signal. This “GHRH + GHS” stack is considered the gold standard for maximizing natural GH pulsatility in research models.
Key Research Focus
- Anabolism & Recovery: Studying the preservation of lean muscle tissue and the acceleration of recovery from exercise-induced micro-trauma.
- Metabolic Optimization: Investigation into fat oxidation and the improvement of lipid profiles via GH-mediated pathways.
- Anti-Aging Research: Evaluating the restoration of youthful growth hormone/IGF-1 levels in aging preclinical models.
Technical Specification Table
| Compound Specifications: Ipamorelin | |
|---|---|
| Classification | Selective GH Secretagogue (GHS) |
| Mechanism | Ghrelin Receptor Agonist |
| Chemical Formula | C₃₈H₄₉N₉O₅ |
| Molecular Weight | 711.86 g/mol |
| Primary Target | GHSR-1a (Pituitary) |
| Half-Life | ~2 hours |
The Benefits of Growth Hormone
What is Ipamorelin?
Ipamorelin is a peptide that has been shown to increase growth hormone levels in humans by stimulating the hypothalamus, which is responsible for regulating the secretion of growth hormone. It works by binding to IGF-1 receptors in the body and mimicking its effects on those receptors. This causes an increase in muscle mass and strength, as well as fat loss due to increased metabolism and lipolysis (the breakdown of fat).
Standard Dosage Protocols
The most common Ipamorelin dosages range from 200 to 300 micrograms mcg per day, typically delivered via subcutaneous injection. Depending on your goal—whether it’s muscle recovery, anti-aging, fat loss, or stacking with other peptides—your protocol may vary.
Typical Daily Dosing
- Beginner: 100–150 mcg once per day (before bed)
- Standard: 200–300 mcg per day, split into 2 doses
- Advanced: Up to 400 mcg per day (divided into AM/PM injections)
Stacking with GHRH (e.g., CJC-1295)
To increase the amplitude and duration of GH release, many users stack with a growth hormone-releasing hormone (GHRH) like CJC-1295 without DAC.
A common stack:
- CJC-1295 (100–200 mcg) + Ipamorelin (100–200 mcg)
- Injected 1–2× daily for 8–12 weeks
Typical Cycle Duration
- Minimum Effective Cycle: 8 weeks
- Optimal Range: 12–16 weeks
Injection Frequency
- 1x per day (bedtime): Ideal for anti-aging, beginners, or fat loss
- 2x per day (AM + PM): Preferred by athletes and bodybuilders for hypertrophy and recovery
- 3x per day (split evenly): Advanced users looking for constant GH stimulation (rare)
For maximum efficiency please feel free to use our free Peptide Calculator
How to Reconstitute Peptides Step by Step
- Clean the rubber stopper of your peptide vial with an alcohol swab and let it dry.
- Using a syringe, draw the calculated amount of bacteriostatic water.
- Insert the needle through the stopper and inject the water slowly down the inside wall of the vial. Do not aim directly at the powder.
- Gently swirl the vial until the powder dissolves completely. Never shake it, as this can degrade the peptide.
- Store the reconstituted vial in your refrigerator (2-8 °C). Use within 3 to 4 weeks.
Frequently Asked Questions
Q: What makes this peptide “selective”?
A: Unlike older GH secretagogues (like GHRP-6), Ipamorelin triggers the release of growth hormone without significantly elevating cortisol, prolactin, or hunger-inducing ghrelin levels, making it a “cleaner” agent for research.
Q: Why is it often stacked with CJC-1295?
A: This is a synergistic research protocol. CJC-1295 (GHRH analog) increases the number of available GH-secreting cells in the pituitary, while Ipamorelin triggers the release of those cells. This stack is studied for its ability to maximize natural GH pulsatility.
Q: Does Ipamorelin cause increased appetite?
A: No. Because Ipamorelin is highly selective for the GH pathway, it does not induce the intense hunger often associated with other ghrelin mimetics.
Q: What is the optimal storage protocol?
A: Store lyophilized powder in a freezer at -20°C for long-term stability. Once reconstituted, it should be kept in a refrigerator (2°C–8°C) and used according to your study’s stability guidelines.
Q: Is this peptide approved for medical use?
A: No. It is an investigational research chemical not intended for human consumption. All protocols must be conducted in accordance with laboratory research standards.
Sources
| Resource | Description | Link |
|---|---|---|
| PubMed | Peer-reviewed literature on Ipamorelin’s selectivity. | View Studies |
| PubChem | Chemical structure, properties, and metadata. | View Data |
| ClinicalTrials.gov | Search for active and historical human study records. | View Trials |
Our Recommended UK Supplier
Ipamorelin is available from Peptronic Labs UK-based, ≥99.0% purity verified by HPLC, Royal Mail Tracked 24. View Ipamorelin
