Here's some good news in the wake of the frustrating stuff we just heard about Vitamin C: Echinacea does help prevent and limit colds. Over the years it seems the data has gone both ways, with people saying first it was great for colds and then later saying it was worthless. But now, as the result of researchers reviewing over 700 separate studies from years past they've determined that yes, echinacea does indeed have a substantial effect on preventing colds and limiting their duration (once they've already been caught).

Of course there are still those out there who argue against this current research's methods and flaws, but since echinacea is a fairly safe supplement to take anyway I'm going to be positive and assume the best!