We’ve all been there before: you’re sitting on the sofa watching a movie, when suddenly you’ve just noticed there are no more chips in the bag. “Did I just eat the WHOLE bag?!” is your first thought, and you’re kind of horrified. Actually, it’s not entirely your fault. That bag of processed potatoes is specially formulated to get you to eat more. Food companies spend millions of dollars every year researching exactly how to get consumers to eat more junk food. So, the next time you think you need some chips or a bottle of cola, remember that what your brain wants and what your body needs are two very different things.