There are so, so many diets out there. Some are low in fat, others are low in carbs. Some involve special foods, others tell you to avoid them. So what's the best diet for you? Watch and learn! Most of the data for this episode comes from this recent paper in JAMA: http://jama.jamanetwork.com/article.aspx?articleid=1900510 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/realjohngreen http://www.twitter.com/olsenvideo