Ipamorelin

Ipamorelin vs sermorelin: how do the GH secretagogue mechanisms differ?

BLBea Lindqvist· 17 days ago

Research & educational use only. This content is not medical advice. Consult a qualified healthcare professional before using any peptide compound.

I am trying to understand the mechanistic difference between ipamorelin and sermorelin, since they both get grouped under growth hormone secretagogues but seem to work differently.

My current understanding is that sermorelin is a GHRH analog acting on the GHRH receptor, while ipamorelin is a ghrelin mimetic acting on the GHS-R1a receptor. Is that the key distinction, and does it explain why people discuss combining the two classes?

9

2 Replies

1
DCDr. Sarah Chen researcher· Expert· 16 days ago

Your understanding is correct. Sermorelin is a GHRH analog acting on the GHRH receptor, while ipamorelin is a ghrelin mimetic acting on the GHS-R1a receptor. They stimulate growth hormone release through two different pituitary pathways.

That is exactly why the two classes get discussed together: because they act on separate receptors, the idea is that they could be complementary rather than redundant. None of this implies a recommendation to use either, and neither is FDA approved for these purposes.

Accepted solution
6
LTLeo Tanaka· Senior· 15 days ago

Worth adding that ipamorelin is often described as relatively selective, with less effect on cortisol and prolactin than older secretagogues like GHRP-6.

Sign in to join the discussion.