This is the scenario: a guy, say age 21, becomes serious about gaining muscle. He’s 5′ 10″, 7″ wrists, 9″ ankles, average genetics for muscle size-and-proportioned. He’s played sports, but never done more than an occasional resistance workout. Now, he begins a good training-eating-and-resting program. With his genetics, he has the potential for naturally gaining 45 pounds of lean mass if he stays consistent with progressive training/proper eating for a continuous 3 to 4 years.
But, about three months after beginning his training, he starts taking steroids. He does three steroid cycles in the following 18 months, and includes proper post-cycle therapy. That entire time, he’s continuing to consistently train and eat properly. Before the end of two years, he’s gained 45 pounds of lean mass (which with steroids, by the way, is not necessarily typical but neither improbable). At that point, he permanently quits using steroids, but he does continue properly training and eating for another two years. At the end of four years, he carries the same 45 pounds of lean mass.
The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
Hi Matt, my name is Mari and I’m vegetarian for 7 years now and vegan for about 8 months. It’s been about an year I started running, and now that I’ve achieved my weight goal, I would like to gain some muscles, because I didn’t really like the way I turned out to be (skinny and tiny). I bought some soy protein powder (I’m from Brazil, so it’s a nacional label) and I drank it for 3 days, 1 scoop (something like 30g of protein) with water. I got so SO swollen and it destroyed my stomach (it hurt for days), so I stopped drinking it. I haven’t bought another type of protein yet (rice or pea), but I was wondering if you have/had the same problem with soy protein as well. Just to make it clear that I’m not allergic to soy, ’cause I eat looots of soy products and I’ve never felt this bad before. I really wanted to drink some powder after my workout, but I don’t know what to do! Do you have any tips? Thank you so much!