16-09-2012, 14:50
Most people seem to believe that FG is moderately progesteronic and weakly estrogenic. There are studies that back that up, but not nearly enough to make the effects of FG perfectly clear. WY is also weakly estrogenic, but it's not progesteronic at all, even though companies continue to imply that it is. SP is an antiandrogen. It block testosterone from turning into another androgen called DHT, which leaves the testosterone free to potentially be converted to estrogen by aromatization. Not all estrogens are produced from testosterone, but estradiol is always produced that way, and as far as I know, it's considered to be the most important for breast growth.