From TED’s About This Talk:

Every day there are news reports of new health advice, but how can you know if they’re right? Doctor and epidemiologist Ben Goldacre shows us, at high speed, the ways evidence can be distorted, from the blindingly obvious nutrition claims to the very subtle tricks of the pharmaceutical industry.

If you do not see the video below, then go to Battling Bad Science. (Eric Mead’s the magic of the placebo is good too.)