Ipamorelin is a 3rd generation GHRP and is almost a potent as the other Growth Hormone Releasing Peptides with some additional benefits. Ipamorelin does not cause any unwanted spikes in Prolactin or Cortisol.

The reaction of the pituitary to an aggressive i.v. dose of Ipamorelin showed that plasma

GH levels were notably reduced whereas they were unchanged after a comparable dose of GHRH. This is actually a good thing as it suggests that Ipamorelin may not decrease your body's natural GH production- providing further proof that Ipamorelin is a more focused and selective GH releasing peptide.

decrease your body's natural GH production - further demonstrating that Ipamorelin is a selective GH releaser.

Unlike GHRP-6, Ipamorelin does not induce hunger making it advantageous to those on a restricted calorie diet. 

 As with all the GHRP's Ipamorelin's effectiveness is greatly enhanced when used in conjection with Modified GRF 1-29.

In another study in rats, Ipamorelin released GH from rat pituitary cells as effectively as GHRP-6. Example usages are 100 mcg of Mod GRF 1-29 taken at the same time as 100 mcg of GHRP-6 or ipamorelin. Such dosings will provide at least as much GH release as for example 300 mcg of either of these GHRP products taken alone.
The combination of Mod GRF 1-29 and a GHRP is synergistic. The GHRP stimulates a pulse of GH release, and the Mod GRF amplifies it.