having also worked at a prison in california, i will tell you right now that NO they dont smuggle in steroids. there isnt a big enough demand for them compared to other drugs. And the risk to dollar ratio just makes it not worth it. yes there are many guys in prison who are ripped and shredded, but mostly the black guys, which goes to show that it is mostly genetic. all the hispanics and whites look just like normal fit guys who workout. and yes, you can order a lot of stuff from the catalogs, but all i saw were liver tabs and amino tabs, made by universal. there were no protein powders in the catalog at the mainline (bigger state run prisons).
now, the private prisons in california (ccf) do let you order all sorts of products directly out of the catalog from nutrition express. you can order anything from creatine to most type of protein powders, but these prisons are for "short timers", people who are being released soon.
-LC