What is the practical difference between CJC-1295 with and without DAC?

CJC-1295 DAC vs no-DAC: the half-life difference explained

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People throw around CJC-1295 with and without DAC as if they are interchangeable. As I understand it, the modified GRF 1-29 form has a half-life measured in minutes, while the DAC (drug affinity complex) version binds albumin and extends action into the range of days.

Is that the core distinction, and is the longer action why the DAC version changes the GH release pattern rather than preserving natural pulsatility? None of this is FDA approved, to be clear.

2 Replies

DCDr. Sarah Chen researcher· Expert· 21 days ago

Your understanding is correct. The DAC version binds albumin to extend its half-life into the range of days, whereas modified GRF 1-29 acts over minutes. The trade-off people debate is that continuous elevation from the DAC form moves away from the natural pulsatile GH release pattern. Neither is FDA approved for these uses.

Accepted solution

BLBea Lindqvist· Senior· 20 days ago

That pulsatility trade-off is exactly the part I was missing. Makes sense why people discuss the two forms so differently.