Decades ago, around the time of Steven Tyler's last haircut, a completely wrong-headed idea started being passed around America's dinner tables: Eating fat makes you fat.
Wrong. Eating fat won't make you fat, any more than eating money will make you rich. Calories make you fat, and most "low-fat" or "fat-free" foods actually have just as many calories as their full-fat versions, because of added sugar and chemicals. And there's no debate on this one: Since we made "cut down on fat" our favorite food craze roughly 30 years ago, the U.S. obesity rate has doubled. Among children, it has tripled. That's a failed food policy if ever there was one.