Ipamorelin
Ipamorelin Acetate
The selective GH releaser
A pentapeptide ghrelin receptor agonist that triggers clean, selective growth hormone pulses without raising cortisol or prolactin. Ipamorelin is considered the most selective GH secretagogue available, making it the preferred choice for those prioritizing minimal side effects alongside GH optimization.
- Typical dose
- 200–300 mcg 1–3x/day
- Availability
- Research-only
Key Benefits
Clean GH elevation without cortisol or prolactin spikes
Improved body composition (fat loss and lean mass retention)
Enhanced deep sleep quality and recovery
Increased bone mineral density over time
Dose-dependent response allowing precise titration
Mechanism of Action
How Ipamorelin works
Ipamorelin triggers growth hormone release through the ghrelin/GHS-R1a pathway:
- Ghrelin receptor (GHS-R1a) activation — binds the growth hormone secretagogue receptor on pituitary somatotrophs, triggering a calcium-dependent GH release pulse. Unlike GHRP-6 or GHRP-2, binding is highly selective with minimal off-target activation
- Selective GH release — does not significantly increase cortisol, ACTH, or prolactin at therapeutic doses. This selectivity distinguishes it from other GH secretagogues that activate broader hormonal cascades
- Amplified pulse amplitude — increases the height (amplitude) of each GH pulse while preserving natural pulse frequency. Complementary to CJC-1295, which extends pulse duration
- Dose-dependent linear response — GH output scales predictably with dose up to saturation, allowing precise titration based on individual response and genetic factors
Your Genetics & Ipamorelin
Genetic variants that affect your response
These SNPs determine how effectively Ipamorelin works for you specifically. A genetic peptide report identifies your variants before you start.
Variants in the growth hormone secretagogue receptor gene affect receptor density and signaling efficiency. Reduced GHSR expression means fewer targets for Ipamorelin, potentially blunting the GH pulse amplitude response.
The GHR exon 3 deletion (d3-GHR) increases downstream GH sensitivity. d3 carriers convert Ipamorelin-induced GH pulses into greater IGF-1 output, potentially achieving results at lower doses.
Variants affecting ghrelin gene expression alter baseline ghrelin levels. Since Ipamorelin competes at the same receptor, high endogenous ghrelin producers may experience different dose-response dynamics.
Somatostatin puts the brakes on GH release. Variants increasing somatostatin tone may partially counteract Ipamorelin's GH pulse, requiring timing optimization (evening dosing when somatostatin is naturally lower).
Which variants do you carry?
Upload your DNA data or order a kit to find out.
Evidence & Research
40+
Published studies
Published human or robust animal studies with clear mechanistic rationale
Sourcing & access
Where to buy Ipamorelin
Ipamorelin is sold as a research compound, not a licensed medicine, so quality and legal status vary widely by country and vendor. If you're sourcing it, treat independent purity testing as non-negotiable.
- Insist on a recent third-party Certificate of Analysis (COA) for the exact batch — labs like Janoshik verify purity and identity.
- Check the legal status where you live before ordering — it differs from country to country.
- Reconstitute correctly with bacteriostatic water and start at a conservative dose.
Swiss Chems is a US research-chemical supplier that publishes third-party Certificates of Analysis. Sold for research use only — check your local laws.
Before you buy: see whether your DNA actually responds to Ipamorelin, and at what dose. Analyze my DNA — $99 →
Educational information only, not medical advice. Some outbound links are affiliate links (disclosed, at no extra cost to you). Most peptides are not FDA-approved — consult a qualified professional and check your local laws before purchasing.
Common Stacks
Ipamorelin is commonly combined with:
CJC-1295
GH Synergy StackModerate EvidenceCJC-1295 (Modified GRF 1-29)
A 29-amino-acid growth hormone releasing hormone (GHRH) analog with enhanced stability. CJC-1295 extends the duration of natural GH pulses without disrupting pulsatile release patterns, providing sustained elevation of growth hormone and IGF-1 for recovery, body composition, and anti-aging.
4
Gene variants
30+
Studies
BPC-157
Injury Recovery StackModerate EvidenceBody Protection Compound 157
A 15-amino-acid peptide derived from human gastric juice. The most-researched peptide for tissue repair, gut healing, and injury recovery. Works through nitric oxide signaling, angiogenesis, and collagen stimulation.
4
Gene variants
100+
Studies
GHK-Cu
Anti-Aging StackModerate EvidenceGlycyl-L-Histidyl-L-Lysine Copper Complex
A naturally occurring copper-binding tripeptide that declines with age. GHK-Cu resets gene expression toward a younger pattern, stimulates collagen synthesis, activates antioxidant defenses, and promotes tissue remodeling across skin, bone, and connective tissue.
Frequently Asked Questions
What is Ipamorelin used for?
Ipamorelin is used to stimulate natural growth hormone release for body composition, recovery, sleep quality, and anti-aging. Its key advantage over other GH secretagogues is selectivity — it raises GH without spiking cortisol or prolactin, making it one of the cleanest GH peptides available.
Why is Ipamorelin paired with CJC-1295?
Ipamorelin increases GH pulse amplitude (how high each pulse goes) while CJC-1295 extends pulse duration (how long each pulse lasts). Together they produce synergistic GH elevation through two different receptor pathways — GHRH receptor and ghrelin receptor — typically yielding 2-3x the output of either alone.
Does genetics affect Ipamorelin response?
Yes. GHSR variants determine how many ghrelin receptors Ipamorelin can activate. The GHR d3/fl polymorphism affects downstream GH sensitivity. Somatostatin gene variants influence how strongly your body counteracts GH pulses. A genetic peptide report identifies these factors for dose optimization.
Learn More About Ipamorelin
Your next move
Two ways forward with Ipamorelin.
Not sure it's for you?
Will Ipamorelin work for your genes — and at what dose?
Your report scores Ipamorelin against your receptor, CYP and pathway variants — likely responder, non-responder, and a sensible starting dose — in minutes.
Analyze my DNA — $99Already decided?
Get Ipamorelin from Swiss Chems.
A US research-chemical supplier with third-party Certificates of Analysis. Sold for research use only — check your local laws before ordering.
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