Several studies have been done on this and for a small dose used for say cruising its supposed to be a great way to keep levels stable etc. heres a log done by a guy named Heavyiron hes a very knowledgeable guy, this is interesting for sure.
http://forums.rxmuscle.com/showthread.php?t=22988
http://forums.rxmuscle.com/showthread.php?t=22988