Ipamorelin
A selective growth hormone secretagogue that stimulates GH release with minimal side effects.
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Compound Profile
Ipamorelin
Key Data
Research reference only
Research Focus
Preclinical data
⚠ Research & Educational Use Only. Ipamorelin is a research chemical documented here for scientific education. All information references peer-reviewed literature and preclinical/clinical study data. Not for human consumption. Not medical advice. Consult a licensed researcher or healthcare professional before any laboratory use.
- Stimulates natural growth hormone release
- Promotes fat loss and body recomposition
- Enhances muscle growth and lean body mass
- Ipamorelin is not FDA-approved for human use. It is a research chemical for scientific study only.
Research At a Glance
- Stimulates natural growth hormone release
- Promotes fat loss and body recomposition
- Enhances muscle growth and lean body mass
- Improves sleep quality and recovery
In Plain English
Simple summaryIpamorelin is one of the cleanest growth hormone secretagogues developed. It binds the ghrelin receptor in your pituitary to trigger GH release -- but unlike older secretagogues like GHRP-6, it does this without raising cortisol, prolactin, or appetite. The GH pulses it produces are sharp, predictable, and don't interfere with your natural GH rhythm the way blunter compounds do. It's rarely used alone: the near-universal pairing in research is CJC-1295 + ipamorelin, where CJC-1295 hits the GHRH receptor and ipamorelin hits the ghrelin receptor simultaneously. That dual-pathway stimulation produces 5–10x more GH than either compound alone.
- Stimulates natural growth hormone release
- Promotes fat loss and body recomposition
- Enhances muscle growth and lean body mass
The full scientific detail, mechanisms, citations, and dosing data, follows below.
What is Ipamorelin?
Tap any underlined term for an instant definition.
Ipamorelin is a pentapeptide and one of the most selective growth hormone secretagogues (GHS) available for research. It works by binding to ghrelin receptors (GHS-R1a) in the pituitary gland, stimulating the release of growth hormone without significantly affecting cortisol, prolactin, or ACTH levels — making it notably cleaner than other GHS peptides like GHRP-6. Ipamorelin produces a strong, clean pulse of growth hormone that mimics natural physiological GH release. It is often combined with a GHRH analog like CJC-1295 for synergistic effects.
By the Numbers
Key Research Benefits
Documented effects observed in preclinical and clinical studies on Ipamorelin. See all Growth Hormone Secretagogues peptides for comparison.
Common Stacks
Ipamorelin is frequently combined with the following peptides for synergistic effects. Click any peptide to compare profiles before deciding.
The gold-standard GH stack - Ipamorelin provides a clean GH pulse while CJC-1295 extends the release window for sustained elevation.
Sermorelin (GHRH) + Ipamorelin (GHRP) is the synergistic dual-mechanism GH stack that produces 8-15x more GH than either alone.
Stacked for improved sleep quality, since Ipamorelin's GH release is highest during deep sleep stages.
Sermorelin (GHRH) combined with Ipamorelin (GHRP) produces synergistic GH release greater than either compound alone.
Side Effects & Risks
Adverse effects reported in the research literature. All data sourced from preclinical and clinical study reports. View all peptides' side effects →
Dosing Data from the Literature
Doses referenced below are sourced from published preclinical and clinical studies. Use the peptide dose calculator to convert these values to injection volume.
Typical research dosing: 200–300 mcg per injection, administered 1–3 times daily. Most common protocol is 2x daily (morning and evening) or pre-bedtime for maximum GH pulse during sleep. Often stacked with CJC-1295 DAC or Mod GRF 1-29.
Administration in Research Settings
Standard reconstitution and administration methodology for laboratory research use.
Reconstitute with bacteriostatic water and administer via subcutaneous injection. Inject on an empty stomach or 2 hours after a meal for best results (high insulin blunts GH release). Inject 30–60 minutes before bed to align with natural GH pulses. Rotate injection sites. Standard cycle: 8–12 weeks on, then break.
Research Video
Medical Expert Videos
Physicians, researchers, and pharmacologists explain Ipamorelin, covering mechanisms of action, clinical context, and study findings.
Videos sourced from YouTube search. KnowYourPeptide does not endorse any individual creator. For research education only.
The Bottom Line
Ipamorelin has a growing body of preclinical evidence and a well-characterised safety profile in research settings. The most-studied application is: stimulates natural growth hormone release.
The most commonly reported side effect in research subjects is water retention, especially at higher doses. It is a research chemical, not approved for human use.
Frequently Asked Questions
Explore Further
Quick Reference
Research Articles
- FDA Peptide Reclassification 2026: What Researchers Need to Know10 min read
- CJC-1295: The Long-Acting GHRH Analogue Reshaping Growth Hormone Research8 min read
- Ipamorelin: What This Anti-Aging Peptide Does and Why Researchers Are Interested8 min read
- Ipamorelin Dosage Guide: Vial Reconstitution, Injection Volumes, and GH Protocol7 min read
How It Compares
GHRP-2 and GHRP-6 are older ghrelin-receptor peptides with stronger GH release but more cortisol, prolactin, and appetite stimulation. Ipamorelin was designed to isolate the GH effect. MK-677 is an oral ghrelin mimetic with 24-hour activity -- useful for sustained GH elevation but doesn't allow the same pulsatile control that ipamorelin enables.
Compare Ipamorelin side-by-sideResearch Use Only
This information is for educational research purposes only. This is not medical advice. Consult a qualified healthcare professional.