My doc discouraged me from including Deca with my Test Cyp. But 100 mgs. of test and 100 mgs. of Deca per week is my HRT regiment in a nut shell. I need the Deca to stay healthy enough (in my joints) to train the way I want to. It really keeps my cardio on point because my knees stay pain free. Just one man's experience. I have to note that I've never had ed symptoms even when I wasn't on HRT (libido has been fine), my usage was for low test blood results and syptoms of lethargy, recovery after training was almost nill, and just a feeling of being tired all the time. Good luck bro.