Ipamorelin

A pentapeptide agonist at the ghrelin receptor (GHS-R1a). It triggers a GH pulse without meaningfully moving cortisol, prolactin or ACTH - that selectivity is what separates it from GHRP-2 and GHRP-6. Because it acts on a different receptor from CJC-1295 (which copies GHRH), the two add up rather than overlap: one raises how big the pulse can be, the other gives permission for it. That is the mechanical reason the pair is stacked, not marketing.

Small human studies; a phase 2 in post-op ileus did not meet endpoint.

The small human work on it tested gastric motility after surgery, not body composition, and it did not meet that endpoint. That is a different question from the one people use it for - worth knowing, not worth worrying about.

Ipamorelin is almost never discussed on its own. The overwhelming convention is to run it with CJC-1295, and the people who tried it alone describe it as quiet - sleep improves, not much else. Sleep is what comes up first and most consistently, inside the first week or two, along with dreams vivid enough that people use them as their informal check that the vial is real. Recovery is the second thing mentioned, usually into the second month, and it is described as shorter soreness rather than anything dramatic. Body composition gets talked about around three months and always in modest terms. The single most repeated piece of practical advice is about timing: people dose away from food, most often at night, because a stomach full of carbohydrate blunts the pulse - and the reports of "I felt nothing" very often turn out to be someone who dosed after dinner. The second most repeated point is that this is the clean one. People choose it over GHRP-6 precisely because it does not make them ravenous, and over GHRP-2 because it leaves prolactin alone.