Many diet pills have ingredients that may not be safe for some people. And NO, most diet pills are not "registered" with the FDA, nor are the regulated by the FDA.......
Most diet pills don't work and if a person does happen to lose weight on one, they will almost always gain back the weight, once the pills are stopped.........
Diet pills are not the best way to lose weight; at worst, they may be dangerous; at best, they are a waste of $.........