Yes I have given my rats cjc with dac.
If you give them one vial a week you will get okay fat loss results but the more vials you give it a week the higher the fat loss results.
I would say go with cjc with dac if you only want to pin your rat once a week but if you don't mind pinning them multiple times a day then I would research ghrp-2 and cjc without dac.