Sandy Szwarc has an interesting series at TCS on obesity. In the current article, she points to disturbing, and plausible, data that indicate that it may be caused by dieting.

I have to say that the more “wisdom” I read from professional nutritionists, the more I think that the entire field is rife with ignorance and quackery (though I suppose the former ameliorates the latter to some degree–are you a quack if you don’t know that you are?).