Ipamorelin + GHRP-2

One receptor, two ligands

Selectivity versus potency

Endpoints in secretagogue research

• Growth hormone release from pituitary cell culture and in rodent models, sampled over time
• Downstream IGF-1 response as an integrative readout of sustained secretion
• Parallel measurement of ACTH, cortisol and prolactin to quantify selectivity
• Calcium flux and receptor internalisation assays in GHS-R1a-expressing lines
• Body composition, sleep architecture and appetite endpoints in whole-animal models

Why researchers add a GHRH analogue instead

A frequent design decision in this literature is whether to combine two GHS-R1a agonists or to pair one with a GHRH-receptor analogue such as CJC-1295 (No DAC). The latter engages a genuinely distinct receptor on the same somatotroph and is more often reported as synergistic. This vial supports the other half of that comparison: what happens when both ligands share a target, and whether the response saturates.

Reconstitute by running bacteriostatic or sterile water slowly down the inner wall of the vial rather than directly onto the cake, then swirl gently — never shake, as foaming at the air–liquid interface can denature peptide. Both sequences carry C-terminal amides and unnatural residues that make them reasonably robust, but the reconstituted solution should still be held at 2–8 °C, protected from light and used within a defined study window. Avoid repeated freeze–thaw. Swab the stopper with an alcohol pad before each entry, and record lot number, diluent identity and volume, reconstitution date and resulting concentration for both components, since the 1:1 fill means one calculation covers each peptide.