Hmmmm maybe it increases sex drive - i haven't taken it religiously 3 x daily to observe whether it's done anything to my lower than low libido. Libido is a weird thing for me, it peaks very rarely, when it does i have no idea what causes it, assumed it was hormones in harmony (for one rare moment in life!) hahaa... perhaps daily isocort use can improve libido...i'll have to experiment and report back ;-)