I've heard YOU CAN, I've heard YOU CANT. Use these two at the same time. If you do,you have to use Bromo,Caber,Prammi. But I see an HIGHLY reputable lab,whose (Mix 3) has Test, Tren, Deca. I want the facts, as well as your opinions. I find the beauty in both,an would love to know,if it's a good...