Check this out:
A 2011 study by Harrison Pope, M.D., a professor of psychiatry at Harvard Medical School and his colleagues found that the average FFMI of steroid users was 23.3, which wasn’t much higher than the 22.8 average of non-users. The study included lifters who used human growth hormone and/or IGF-1 in addition to steroids. Their average FFMI was 26.2.
Pope’s research also shows the clearest difference between users and non-users. Steroids preferentially increase the size of the muscles that attach to the shoulder joints: the lats, trapezius, pectorals, deltoids, and upper arms. (Interestingly, that’s also where steroid-induced acne is most likely to appear.) A guy who’s “yoked,” with traps big enough to support their own ecosystems, almost certainly had pharmaceutical assistance.