I don't know a ton about most anabolic steroids (typically derivatives of testosterone) - but testosterone is known to be highly beneficial in dosages that bring a man up to around 700-900ng/dl. Aka, around the levels of a very healthy 20-something-year-old. This is well studied.
There is a really well done study where they gave a large number of healthy men 500mg testosterone per week for I believe 12 weeks. That put them at about 2000-3000ng/dl, or three times a normal males levels. The results showed only one or two participants had a significant side affect and all participants recovered fine.
Remember, anabolic androgenic steroid (AAS) just means a growth promoting "anabolic" male sex characteristic related "androgenic" molecule with 17 carbon atoms "steroid".
Most people don't realize this, but testosterone IS an AAS. It's a bioidentical hormone.
You probably think it's bad to take, because of bad media. But what do you think is in birth control? Most birth control is a pill full of estrogen and progesterone, two other bio-identical sex hormones. A large percentage of the female population in the USA is on birth control, and they don't seem to be dying any quicker from what a quick search shows.