We Americans do love our dietary supplements. More than half of the adult population have taken them to stay healthy, lose weight, gain an edge in sports or in the bedroom, and avoid using prescription drugs. In 2009, we spent $26.7 billion on them, according to the Nutrition Business Journal, a trade publication. What consumers might not realize, though, is that supplement manufacturers routinely, and legally, sell their products without first having to demonstrate that they are safe and effective. Inside, Consumer Reports Health lists 12 supplements linked by clinical research or case reports to serious side effects
