Comment Sugar is the problem, not fat (Score 5, Informative) 211
I first stumbled on this video 8 years ago, "The Bitter Truth About Sugar" by Dr. Robert Lustig. He's an endocrinologist specializing in childhood obesity. It's a long video and he goes through the history of fructose consumption in the U.S. and gives statistics demonstrating the correlation between fructose and weight, but correlation does not imply causation. In the last 19 minutes he goes through the explicit metabolic responses by the human body to ingesting fructose. That convinced me to listen.
So I tried the experiment: severely restrict the amount of sugar (fructose to be precise, not glucose) in my diet: no soda, no candy, no ice cream, no fruit juices that weren't freshly squeezed by myself. The result: I went from 268 lbs. down to 205 lbs in approximately 4 months. He convinced me. The experiment was a success.