CJC-1295 is a modified version of the first 29 amino acids of GHRH, which means it is chemically similar to other GHRH analogues, like Sermorelin.
It is most similar to modified GRF (1-29), but the two peptides are not identical. A great deal of confusion arises because of the similarities between these peptides and because CJC-1295 was originally created with an added chemical compound called the drug affinity complex (DAC).
DAC is added to the molecule, with the help of a lysine linker, to protect the peptide while it circulates in the blood stream. By allowing peptides to bind to the common blood protein albumin, DAC helps to ensure that the half-life of CJC-1295 is much longer than similar molecules like GRF (1-29). Half-life of CJC-1295-DAC compared to standard growth hormone releasing factor (GRF).