Those guys must have a serious setup in China producing all their designer-steroid powders etc. to be supplying a popular retail brand like Blackstone labs.
If they can produce large amounts of pure "designer steroids" and "pro hormones" they can produce pure pharma grade shit like Anavar, Dbol, Primo, all the good shit too...With an ever so sliiiight disregard for the law.
If I was a pro bodybuilder I would see this as a huge contributing factor in this relationship.
Solid business men (Drug dealers) are a pro's BEST FRIEND. Hell more like only friend..
Yeah one might suspect that a company such as this was simply a front for illegal drug sales.
I don't know if it's true that as you say that this black stone labs is connected to Prime, but if it is then they are already in the illegal hormone market. It is not legal to sell these designer steroids (ask Rick Collins). It's certainly true that if they can get these designers into the country then they can get everything else too, the more explicitly banned hormones.
But I'm just wildly speculating here, I have no insight into this particular company.
It's true that most legal supplement companies were started with proceeds from drug sales.