I wouldn't be surprised if someone gave him prohormones or some other OTC, and called it Dianabol or Anadrol to make him happy. While he isn't totally dim, I don't think he has enough smarts to source real stuff, and I doubt his handlers would risk actually giving him actual illegal drugs.
Apparently he does have a dealer who sells him shit and does all his injections and everything. I can't find the video where he calls him to "hold on to his stuff for him." But basically he just goes to this guy, pays whatever he can, the guy gives him whatever he gives him, does his injections and gives him his pills and sends him on his way. Adam made Jason call the guy and tell him to stop selling him shit. Jason said that he'll stop using for 3 months or whatever and for the guy to hold on to the stuff he already paid for.
Jason's been on actual gear for years, apparently. Mostly orals cause he's probably scared of needles. He's had liver and kidney issues in the past. He's had high blood pressure, etc.. And he kept telling the doc and his mom it was from drinking energy drinks, but we all know why his organs so fucked up.