Last week I talked to you about dietary cholesterol, and how the existing randomized controlled trials warned us that they wouldn't work. Now, it appears those guidelines might be changed, decades later. Cholesterol isn't the only recommendation that is controversial. So are the ones on fat. Prepare to get annoyed. For those of you who want to read more, go here: http://theincidentaleconomist.com/wordpress/?p=61881 John Green -- Executive Producer Stan Muller -- Director, Producer Aaron Carroll -- Writer Mark Olsen -- Graphics http://www.twitter.com/aaronecarroll http://www.twitter.com/crashcoursestan http://www.twitter.com/johngreen http://www.twitter.com/olsenvideo