Supplement/Steroid business is the safest business to be a rat in. I can count on two hands and have fingers left over the amount of truly violent incidents I've seen in it, and most of those were only tangentially involving steroids, eg - drug rip offs, domestics, etc.....
Best thing for them to do is box him out of the industry, and force him to sell. If I were Wheat, that would be the play. You can replace Singerman easy enough, and not have to look over your shoulders as much.