Experts weigh in on which vitamins to toss back or toss out

Experts weigh in on which vitamins to toss back or toss out - CNN.com: "Americans love to take their vitamins. More than 150 million Americans take dietary supplements according to the Council for Responsible Nutrition, a supplement industry trade group.

But what should you do? Walk through the vitamin aisle of any grocery store, and you're hit by a staggering array of options. From vitamin A to glucosamine to milk thistle (what is that, anyway?) to whey protein, it's hard to decide what to take.

That's why this week the Empowered Patient asked four experts -- all medical doctors -- what supplements they take every day. Their lists may surprise you -- they all take at least two supplements -- some take three or four or more."