1-AD is a *non-aromatizable* androgen...
what this means to the everyday user is this:
(I came to this conclusion all by myself while "studying" in my psychology class )
During a cycle of androgens, your bodys production of testosterone shuts down...duh
and if the androgens that you are giving your body cannot aromatize (like 1-AD and 1-Test), then there will be less circulating estrogen in the body, resulting in less water retention, less lubrication in the joints, and therefore some slight pain the the joints worked
I hope this sheds some light on the subject