An investigation into the hidden dangers of vitamins and supplements, a multibillion-dollar industry with limited FDA oversight. The film examines the marketing and regulating of supplements, and cases of contamination and serious health problems.

Since it began in 1983, Frontline has been airing public-affairs documentaries that explore a wide scope of the complex human experience. Frontline's goal is to extend the impact of the documentary beyond its initial broadcast by serving as a catalyst for change.