Frontline’s Supplements and Safety will air Tuesday January 19th on WSKG at 9pm. It’s estimated that half of all Americans take a health supplement every day, from fish oil to multivitamins to diet pills. The more than $30 billion vitamins and supplements industry says these products can make consumers healthier. But Supplements and Safety, a FRONTLINE investigation in collaboration with The New York Times that premieres tonight, raises tough questions about how vitamins and supplements are marketed and regulated, and examines how it’s often hard to know what’s really in the bottles you’re buying. In short, unlike with medical drugs, companies making vitamins and supplements do not have to prove that their products are safe and effective before putting them on the market — unless they’re introducing a new ingredient that’s never been marketed before.