on a side note - one of the only AAS that body fat % plays a role in is just plain old Testosterone. most all other AAS it does not play a role at all because most other AAS don't aromatize into estrogen . the Aromatize enzyme is located within fatty tissue. the more body fat you have the more potential you have for aromatization and converting test into estrogen.. and yes this can alter how your physique looks.
now this isn't necessarily a bad thing at all . lots of guys say you need to be low BF% before ever running any type of cycle because if your BF is high you'll convert too much estrogen.
this is ridiculous of course. because for one most drugs available to us don't aromatize in the first place, and second because estrogen is an anabolic health promoting hormone in the first place and something we generally will want more of when on cycle (ie, if adding muscle is the goal of your cycle).
if your body fat % is higher, and you convert more estrogen its quite likely that you'll put on more muscle.
this is also displayed in biology and evolution.
why is the aromatase enzyme located in and related to fatty tissue? why is it that the more body fat you you'll convert more estrogen?
why is it that if you get extremely lean, like 4% bf, that your estrogen lill naturally crash?
because estrogen is the hormone that drives the Male libido and is responsible for procreation.
mammal species naturally know that during times of famine and starvation when they can't feed themselves they should not be procreating and having offspring that they cannot feed either. super low BF% is a biological sign of starvation. your estrogen levels shut down and thus so does your libido and ability to even have sex.
this is why the Aromatase enzyme is located/related to body fat levels.
when your in a time of 'feast' and not famine, when your well fed and healthy and body fat % is high, then you'll convert more estrogen and have a strong libido and drive to procreate
so really , only Testosterone itself is the only drug that Body fat % plays any role in
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