In this study, done in the early 80’s, a very high dose of Dbol (100mgs/day for 6 weeks) decreased plasma testosterone to about 40% of it’s normal value, plasma GH went up about a third, LH dropped to about 80% of it’s original value, and FSH went down about a third also (these are all approximate numbers, for the sake of brevity, but you get the idea). Bodyfat did not go up significantly and Fat Free Mass went up anywhere between 2-7kgs (3.3kgs average gain). The researchers concluded that Dbol increases Fat Free Mass as well as increasing strength and performance