Like what?
http://en.wikipedia.org/wiki/Food_and_Drug_Administration#Fo...
http://en.wikipedia.org/wiki/Regulation_of_food_and_dietary_...
"The Dietary Supplement Health and Education Act of 1994 mandated that the FDA regulate dietary supplements as foods, rather than as drugs. Therefore, dietary supplements are not subject to safety and efficacy testing and there are no approval requirements. The FDA can take action against dietary supplements only after they are proven to be unsafe. Manufacturers of dietary supplements are permitted to make specific claims of health benefits, referred to as "structure or function claims" on the labels of these products."