Ok, to my knowledge there is no "medical doctrine" to prove that "Deca" fills the joints with fluid or water, or that it creates "joint space"?? But the entire world of users cannot be wrong as to the relief that they say it gives them from injury. And, minus the increase in prolactin, which can cause DECA-DICKIE-DOO, which CAN be combatted, I have never seen any studies referencing that long term, therapeutic dosing proves harmful. Not saying there are no studies that exist, just saying that I haven't seen them. And if administered properly, it gives relief from injury or deterioration of joints, and Hormone Replacement Therapy (HRT) is about regaining that "youthful" edge in life that has been lost, than I think its place is very clear.