The gyno caused by tren is due to prolactin buildup as opposed to estrogen buildup. From what I've read, cabergoline is good in combating the gyno that may occur from tren use. Also, bromocriptine is supposed to do the same thing, its cheaper, but has more sides than cabergoline. Do a search on the topic, you'll find a ton of useful info on here...i think a couple of sites are listed in some of the threads that will lead you to where you can get some cabergoline.