People know intellectually that fast food is bad for them, so why do they still crave it?
"Today, high calorie foods are not only abundant; they contain much higher amounts of sugar and fat than what's found in natural food sources."
Are you hungry right now? It could be because your brain doesn't have enough leptin.
If you've ever tried to quit smoking, you know that it's one of the harder habits to break. Learn about the nicotine patch on this Moment of Science.