In 2007, I stopped taking vitamins after hearing Larry Norton speak at the Aspen Ideas Festival. He fielded a fascinating Q&A, and his answer to the first question completely changed the way I think about the immune system and vitamins. FYI: Men are 11 times more likely to develop an aggressive prostate cancer if they take a daily multiple vitamin.

For those of you short on time, the most interesting stuff is in response to the first question at 12:50 in the audio:

Aspen Ideas Festival: Larry Norton

Click here to read my update to this post on January 10, 2013