This study confirms what we know about Testosterone, but this study finds that Estradiol aids libido and fat loss. The conclusion on Estradiol I believe to be extremely premature. First, it flies in the face of all the accumulative data on estradiol, second, what normal physiology is being replicated with goserelin??? goserelin has been shown to decrease Prolactin which can effect libido also. What about the potential there? The men included in the study were described as "healthy". So, you are taking "healthy" normal funcitoning men, throwing in a monkey wrench and looking at the effects of your monkey wrench. Sorry, not physiologic. In all my practice, I have seen one man with low Estradiol levels. There is no reference to the hormone levels in the men preceding the suppression with goserelin. This is a study that lacks application.