You've probably heard it all your life -- carrots are good for your eyes because of the beta carotene that gives them their bright orange color. In the past studies have shown that taking beta carotene supplements help to prevent or lessen the severity of macular degeneration -- the leading cause of blindness in people over age 65, but today there is information that beta carotene might not be helping at all. It was a big study (over 21,000 men), and it found no difference between those who took beta carotene and those who took a placebo as far as their risk for developing macular degeneration. So which information is right?

At this point doctors are just saying to eat a variety of foods to ensure a complete balance of nutrients, and in the meantime they'll continue researching.

But one question: why did they study only men?