It must freakng work or the FDA would not be interested. The last thing that care about is the saftely of products on the market.

 If must work and be threatedning the profits of their owners the phamcuatical companies.

Yeah. It's kinda like the BIG snake oil dealers edging out the little snake oil dealers. Something like the Mafia gang wars, except on a much larger, all-encompassing scale.

Of course, probably all the dealers, both big and small, have something that is good here and there.