Vitamins are widely used in the U.S., to the tune of between $15-20 billion dollars per year. But what are vitamins and what do they do? How are they regulated by the FDA and does the clinical trial data on vitamin supplementation justify our consumer appetite for them? Over this two part episode we'll discuss all of that. The goal, as always is to simply inform so that we can all make up our own minds about the role that vitamins might play in our general good health.