BUILD · Compound 11
Pentapeptide, selective growth-hormone secretagogue
Ipamorelin is a selective pentapeptide secretagogue, studied for prompting growth-hormone release through the ghrelin-receptor pathway with minimal off-target hormonal signalling.
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Ipamorelin is a synthetic pentapeptide and a selective agonist at the growth-hormone secretagogue receptor (GHS-R1a), the same receptor the body’s own ghrelin acts on. It sits in a different place in the axis than a GHRH analogue, which makes the two useful to study side by side.
Selectivity is the defining feature in the literature. Earlier secretagogues tended to move cortisol, prolactin and ACTH alongside growth hormone, which muddies any readout. Ipamorelin is characterised by a comparatively clean profile, and that is precisely why it is favoured where an uncluttered GH signal matters.
Because the response is receptor-mediated and pulsatile, impurity shows up directly as noise in the data. ONE% supplies Ipamorelin lyophilised, batch-verified, so the signal being measured stays clean from study to study.
Mechanism In Brief
Ipamorelin binds the GHS-R1a (ghrelin) receptor to trigger endogenous growth-hormone release, with comparatively little effect on cortisol, prolactin or ACTH.
Every ONE% compound ships as a lyophilised powder for stability in transit. Reconstitute with bacteriostatic water to the concentration your protocol requires, store at 2–8°C protected from light, and use within your laboratory’s validated window. Each vial is batch-referenced to its Janoshik Certificate of Analysis, available on request.
Important
For research and laboratory use only. Ipamorelin is supplied strictly as premium-grade research material with a batch Certificate of Analysis. It is not a drug, supplement, food, or cosmetic, and is not intended for human or veterinary use, diagnosis, treatment, or the prevention of any condition. All statements describe published research directions only.

The Proof
Third-party tested, every batch. Every Certificate of Analysis released with the vial, not on request.
Complete Your Kit
The instrument and the consumables that go with the range. Reusable pen, cartridges, and the essentials.






Good To Know
It ships as a lyophilised (freeze-dried) powder. In the lab it's reconstituted with bacteriostatic water to the concentration your protocol requires. Kept sealed, cold and dark, it stays stable until you need it.
Sealed at 2–8°C, protected from light. As a lyophilised powder it's stable in transit; once reconstituted, follow your laboratory's validated window.
No, every compound ships as a lyophilised vial and is reconstituted in the lab. The ONE% Pen is a separate reusable instrument for laboratories that want repeatable, graduated delivery instead of drawing by syringe each time. Buy it once; it is not tied to any one compound.
Every vial carries a batch code. Enter it on our batch verification page to pull up that batch’s Certificate of Analysis, or ask us for the certificate before you order, we would rather you check than take our word for it.
It is the target every batch of Ipamorelin is held to, measured by HPLC at Janoshik and reported on the COA as a percentage of the total peptide content. Identity is confirmed separately by mass spectrometry. A purity figure without a named method and a batch reference behind it is marketing, not data.
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info@onepercentpeptides.com