GRF(1-29) is produced and sold as a drug called Sermorelin. It has a short-half life measured in minutes. If you prefer analogies think of this as a Testosterone Suspension (i.e. unestered).

To increase the stability and half-life of GRF(1-29) four amino acid changes where made to its structure. These changes increase the half-life beyond 30 minutes which is more than sufficient to exert a sustained effect which will maximize a GH pulse. This form is often called tetrasubstituted GRF(1-29) (or modified) and unfortunately & confusingly mislabeled as CJC-1295. If you prefer analogies think of this as a Testosterone Propionate (i.e. short-estered).

Note that some may also refer to this as CJC-1295 without the DAC (Drug Affinity Complex).

Frequent dosing of either the aforementioned modified GRF(1-29) or regular GRF(1-29) is required and as previously indicated works synergistically with a GHRP.

In an attempt to create a more convenient long-lasting GHRH, a compound known as CJC-1295 was created. This compound is identical to the aforementioned modified GRF(1-29) with the addition of the amino acid Lysine which links to a non-peptide molecule known as a "Drug Affinity Complex (DAC)". This complex allows GRF(1-29) to bind to albumin post-injection in plasma and extends its half-life to that of days. If you prefer analogies think of this as a Testosterone Cypionate (i.e. long-estered). Unfortunately CJC-1295 results in growth hormone bleed. This means that although pulsation remains base levels end up chronically elevated.

CJC 1295 no dac = Mod grf?

I personally use GHRP-2 and Mod GRF(1-29) and have not experienced any sides to date

Which GHRP to choose:
GHRP-6 is sloppier in that it activates a wider array of effects beyond GH release. It causes intense hunger and gastic motility. It can have a mild effect on cortisol and prolactin. It is a first generation GHRP.

GHRP-2 is less sloppy with a more intense GH release, no gastric motility and less hunger effect. It can have an effect within the normal range on prolcatin and cortisol. It is a second generation peptide.

Ipamorelin is not sloppy at all. It does not release as much GH as GHRP-2 but it causes virtually no hunger or gastric motility and for the most part does not effect cortisol or prolactin. It is a third generation peptide

You would choose GHRP-2 unless you wanted GHRP-6 for the hunger effect or for the lower release profiles.

You would choose GHRP-2 normally as the most bang for the buck.

If you are very sensitive to perturbations in cortisol or prolactin you would choose the more expensive Ipamorelin.

The very Basic guide to GHRP/GHRH Peptides

look into ghrp