I've ran a lot of cycles before and easily one of my favorite bulking cycles was a Deca Sustanon and Dbol combination and its always built good lean mass for me. As of recently I have discovered tren and I love it. I've done 3 tren cycles in total with a test base (Sustanon) and I was wondering if replacing the deca I normally use in my bulking cycles could be replaced with tren. Would there be any bad side effects I should be worried about when doing this?