50 Cent is set to add to his empire by launching a new dietary supplement company. The rapper, who already has his own record label, energy drink, publishing house and clothing line is hoping to launch his new venture in conjunction with a new movie, in which he plays a boxer. The well-toned hitmaker says, "I'm getting ready to do a dietary supplement company, so I have a nutritionist and a physical trainer travel everywhere with me. I'm preparing for a boxing film. "I'll be working out with Roger Mayweather, (boxer) Floyd Mayweather's uncle."