Ipamorelin UK Research Guide (2026)

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Ipamorelin UK Research Guide · Written by Raquel Whatmough, Founder of MyPep Biotech · Updated October 2026 · Strictly for laboratory research use only

Ipamorelin is one of the best-known growth hormone secretagogue research peptides. This Ipamorelin UK guide explains what the Ipamorelin peptide is, how it is thought to work, what Ipamorelin research has explored, its UK legal status, Ipamorelin prices in the UK, and the difference between Ipamorelin and CJC-1295. You can source documented Ipamorelin 10mg vials from MyPep Biotech with fast tracked UK delivery.

What Is Ipamorelin?

Ipamorelin is a synthetic pentapeptide (five amino acids) developed in the 1990s by researchers at Novo Nordisk. It belongs to a class of compounds called growth hormone secretagogues (GHS): substances studied for their ability to signal the pituitary gland to release growth hormone.

Ipamorelin acts on the ghrelin receptor (GHS-R1a). What made it stand out in early research was its reported selectivity: in the original animal studies, it stimulated growth hormone release without the large increases in cortisol and ACTH seen with some older secretagogues.

Ipamorelin at a Glance

• Type: synthetic pentapeptide; growth hormone secretagogue
• Target: ghrelin receptor (GHS-R1a)
• Molecular formula: C38H49N9O5
• Molecular weight: approx. 711.9 g/mol
• Developed: 1990s (Novo Nordisk)
• UK status: not a licensed medicine; supplied for research use only
• MyPep formats: Ipamorelin 10mg vial and Ipamorelin blends (see below)

What Has Ipamorelin Research Looked At?

1. Selective growth hormone release

The original research focused on how selectively it triggered growth hormone release in animal models, compared with other secretagogues such as GHRP-6 and GHRP-2. This selectivity is the main reason it remains popular in growth hormone research today.

2. Gut motility research

Ipamorelin was later studied in a clinical research programme for postoperative ileus, a condition where the gut slows down after surgery. The trial did not meet its main goal, and it was not developed into an approved medicine.

3. Combined research with CJC-1295

Ipamorelin is frequently researched together with CJC-1295, a GHRH analogue. Because the two peptides act through different receptors, researchers study the combination to explore how the two signalling pathways interact. See our CJC-1295 & Ipamorelin UK guide.

Ipamorelin vs CJC-1295: What Is the Difference?

• Ipamorelin: a ghrelin-receptor agonist (growth hormone secretagogue), five amino acids, short-acting in research models
• CJC-1295: a GHRH analogue that acts on a different receptor (GHRH-R); available with or without DAC
• Together: often studied as a pair because they work through two separate pathways

Ipamorelin UK Legal Status

Ipamorelin is not an approved or licensed medicine in the UK. It can be supplied for in-vitro and laboratory research only. Growth hormone secretagogues, including Ipamorelin, are prohibited in competitive sport under WADA rules. MyPep Biotech does not provide dosing guidance for humans or animals.

Ipamorelin Price UK

At the time of writing, the MyPep Biotech Ipamorelin 10mg vial is £48.99, with fast tracked UK delivery. When comparing prices in the UK, look at price per mg, purity documentation such as a Certificate of Analysis, and UK-based dispatch.

Which Ipamorelin Research Formats Are Available?

• Ipamorelin 10mg vial: single-peptide lyophilised research vial
• CJC-1295 + Ipamorelin vial: combined research vial
• CJC-1295 + Ipamorelin 20mg blend pen: calibrated research pen
• Nocturne GH™ blend pen: DSIP + CJC-1295 + Ipamorelin research blend

How Does Ipamorelin Work? The Research Theory

In research models, it binds to the ghrelin receptor on cells in the pituitary gland. This sends a signal that leads to a pulse of growth hormone release. Because it was reported to cause less stimulation of other hormones such as cortisol in early studies, researchers describe it as a “clean” or selective secretagogue.

Storage and Handling of Ipamorelin

• Store lyophilised Ipamorelin refrigerated (2–8°C), dry and away from light
• After reconstitution with bacteriostatic water, keep refrigerated and follow your lab protocol
• Avoid repeated freeze–thaw cycles; see our peptide reconstitution guide

What Do Common Ipamorelin Research Terms Mean?

• Secretagogue: a substance that causes another substance to be released
• Ghrelin receptor: the receptor targeted by ghrelin, often called the “hunger hormone”
• GHRH: growth hormone-releasing hormone
• Pituitary gland: a small gland at the base of the brain that releases growth hormone

Why Do UK Researchers Choose MyPep for Ipamorelin?

• UK-based supplier with fast tracked UK delivery
• Single Ipamorelin vials plus CJC-1295 + Ipamorelin blends
• Quality information on our Lab Tests & Purity page
• Friendly UK support via our contact page

Ipamorelin UK: Frequently Asked Questions

Is Ipamorelin legal in the UK?

Ipamorelin is not a licensed medicine in the UK, but it can be supplied for laboratory research use only. It is prohibited in competitive sport.

What is Ipamorelin?

Ipamorelin is a synthetic five-amino-acid peptide and a selective growth hormone secretagogue that acts on the ghrelin receptor.

How much is Ipamorelin in the UK?

MyPep Biotech currently supplies an Ipamorelin 10mg research vial for £48.99.

Where can I buy Ipamorelin in the UK for research?

You can order research-grade Ipamorelin online from MyPep Biotech, a UK supplier with tracked UK delivery.

Why is Ipamorelin paired with CJC-1295?

Because they act on two different receptors, researchers study Ipamorelin and CJC-1295 together to explore how the two growth hormone pathways interact.

Does MyPep provide Ipamorelin dosage information?

No. Our products are for in-vitro laboratory research only, so we do not provide dosing guidance for humans or animals.

Summary

Ipamorelin is a selective, five-amino-acid growth hormone secretagogue and one of the most studied peptides in growth hormone research, often paired with CJC-1295. It is not a licensed medicine in the UK. For UK researchers, the MyPep Biotech Ipamorelin 10mg vial offers a documented option with fast tracked UK delivery.

Strictly for laboratory research use only. Not for human or veterinary use. This guide is for educational purposes and is not medical advice.

About the author: Raquel Whatmough founded MyPep Biotech, a UK research peptide supplier. Our guides use published scientific studies. Each one is checked for accuracy and UK rules.

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