Americans are fat because they eat too much and exercise too little. But they eat too much and exercise too little because they’re addicted to sugar, which not only makes them fatter but, after the initial sugar rush, also saps their energy, beaching them on the couch. “The reason you’re watching TV is not because TV is so good,” he said, “but because you have no energy to exercise, because you’re eating too much sug…
A lot of low fat foods end up being high in sugar and end up having lower satiety than "regular" foods. The perfect example being skim milk vs. whole milk. That's super important because it means that people can consume the same calories but still feel hungry with a "low fat" food. And then they are faced either with persistent feelings of hunger or to eat more until they feel full. Also, high sugar foods are easily converted into body fat, which just makes the problem that much worse.