Well, depends what your goals are for running deca? For just joints? If you do, i would recommend caber it will for sure raise prolactin. But personally to just add it for joint pain, I personally wouldn't rec it for that reason. 50yrs old at 300mg Test C a wk is not a TRT dose, its somewhat a blast. And why HCG at 50yrs old? you thinking of having kids again? I am 43, no HCG. yes my boys are shrinking but that goes with the territory. I don't know my friend, sounds like you are on a lot for just TRT. Maybe you want to run TRT at a lower dose, say 150ish. Then when you blast for 2months bring it up to 300mg and add deca and caber, then go back down to TRT dose. Thats my take.