@BowsacNoodle @spiral_power @BronzeAgeHogCranker @d0c40r0 @kf01 only by sport anti-doping orgs. Law hasn't caught up to it yet so you can just buy it if you want. Goes under the name RAD-140 as well.

As a personal account, i found it to work p well. measurable positive effects at a moderate dose, albeit with steroid-like side effects such as skin going to hell