Ipamorelin UK — Mechanism, Selectivity & Research Handling
Ipamorelin is a pentapeptide growth hormone secretagogue. It binds the ghrelin (GHS-R1a) receptor and is notable in the literature for its selectivity — it produces a growth hormone signal with markedly less effect on cortisol and prolactin than earlier secretagogues such as GHRP-6 and GHRP-2.
That selectivity is the reason it remains one of the most frequently referenced compounds in growth hormone axis research.
For in vitro research use only — not for human or animal consumption. Not a licensed medicine in the UK. Nothing on this page is medical advice.
What is Ipamorelin?
Ipamorelin is a synthetic pentapeptide — five amino acids — designed as a selective agonist of the growth hormone secretagogue receptor. Where non-selective secretagogues also trigger adrenocorticotropic and prolactin responses, Ipamorelin's published profile is far cleaner, which makes it a useful isolated variable in study design.
Why selectivity matters in research
If a compound moves several hormonal axes at once, attributing an observed effect to growth hormone signalling specifically becomes difficult. Ipamorelin's narrow receptor profile makes it a comparatively clean tool for that purpose, which is why it appears so often as the secretagogue arm in combination studies.
Ipamorelin in combination research
Because Ipamorelin acts on the ghrelin receptor and GHRH analogues such as CJC-1295 and Tesamorelin act on the GHRH receptor, combination protocols are common in the literature — two separate receptors, one shared axis.
Buying this peptide in the UK
- UK-held stock — Same-day Royal Mail Tracked 24 dispatch on orders by 1pm, Monday to Friday.
- Royal Mail tracked with photo confirmation on every parcel.
- Independent HPLC and mass-spec testing with a batch-matched Certificate of Analysis.
- Discreet plain packaging and normal UK card checkout — no crypto required.
- buy Ipamorelin UK — stock, pricing and vial sizes
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View full shopFrequently asked questions
Why is Ipamorelin described as selective?
It produces a growth hormone signal with far less impact on cortisol and prolactin than earlier secretagogues such as GHRP-6 and GHRP-2, which makes it a cleaner variable in study design.
Is Ipamorelin legal in the UK?
Ipamorelin is legal to buy and possess in the UK for laboratory research purposes. It is not a licensed medicine in the UK, is not prescribed by the NHS, and is supplied strictly for in vitro research use only — not for human or animal consumption.
How is Ipamorelin reconstituted?
Ipamorelin is supplied as a sealed lyophilised vial. We do not provide preparation or usage guidance; it is sold for in vitro research use only.
Do you supply a Certificate of Analysis for Ipamorelin?
Yes. Our batches are independently HPLC and mass-spec tested and the batch number on the vial matches a published Certificate of Analysis, so purity can be verified before use.
How fast is UK delivery?
Stock is held in the UK. Orders are shipped the same day when ordered by 1pm, Monday to Friday, via Royal Mail tracked with photo confirmation, in discreet plain packaging with no product names on the outside.
Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.