MOST THINGS WILL BECOME ESTROGEN, BUT NOT AS BAD AS TEST, I NEVER SO ANYONE GET GYNO FROM DECA ALONE (UNLESS YOU USE HIGH DOSAGES), I AM A BELIEVE OF LOW DOSAGES, I NEVER GO MORE THEN 2CC OF ETHENATE A WEEK USUALLY 1.5CC AND A HALF OF CC OF DECA SOMETIMES ONE CC. IF YOU TRAIN,EAT,AND SLEEP...