Ipamorelin vs Sermorelin
Ipamorelin and Sermorelin are compared constantly, but like the CJC-1295 pairing they are not really rivals — they act on two different receptors of the growth-hormone axis and are most often studied together. Ipamorelin is the secretagogue; Sermorelin is the GHRH analog.
SIDE BY SIDE
| Ipamorelin | Sermorelin | |
|---|---|---|
| Class | GH secretagogue (ghrelin-receptor agonist) | GHRH analog (shortened GHRH 1-29) |
| Receptor | Ghrelin / GHS-R | GHRH receptor |
| Studied effect | Triggers a pulse of GH release | Prompts the pituitary via the GHRH pathway |
| Half-life | Short, pulse-like | Very short — mimics native GHRH kinetics |
| Selectivity | Minimal effect on cortisol or prolactin in studies | Acts on the GHRH axis |
| Research role | The "pulse" half of the classic pairing | The "baseline" GHRH half of the pairing |
WHEN TO RESEARCH WHICH
Ipamorelin is a selective ghrelin-receptor agonist (a GH secretagogue) studied for clean, pulse-like GH release. Sermorelin is a GHRH(1-29) analog studied for raising the baseline of that release at the GHRH receptor. Because a secretagogue and a GHRH analog act synergistically, the two are commonly studied as a pair. We stock Ipamorelin; Sermorelin is a reference comparison here.
FREQUENTLY ASKED
What is the difference between Ipamorelin and Sermorelin?
Ipamorelin is a ghrelin-receptor agonist (a GH secretagogue) studied for triggering GH pulses. Sermorelin is a GHRH(1-29) analog studied for prompting release via the GHRH receptor. They act on different receptors, which is why they are usually studied together.
Why are Ipamorelin and Sermorelin combined in research?
A secretagogue (Ipamorelin) and a GHRH analog (Sermorelin) reach GH release by complementary pathways, so the combination is studied for a synergistic effect. Both are for research purposes only.
Do you stock both?
We stock Ipamorelin, HPLC-verified and CoA-certified. Sermorelin appears here as a reference comparison; browse our GH research range for what is currently in stock.
MORE COMPARISONS
All products supplied for research purposes only. Not for human consumption.