The addictiveness of cheese, though, isn't just in your head -- at least, not in the conventional sense -- the stuff is really addictive! Cheese actually contains massive concentrations of fat and salt, which our brains love. Alongside all the delicious salty fat, there are also protein fragments called casomorphins, which "can attach to the opiate receptors in your brain," says Dr. Neal Barnard, founder and president of the Physicians Committee for Responsible Medicine.
CNN goes on to say that this high-fat, high-salt manufacturing is actually closer to the manufacturing of drugs than we think! Erica Schulte, graduate student of psychology at the University of Michigan belives so, too. "In a similar manner that drugs are processed to increase their addictive potential, this study provides insight that highly processed foods may be intentionally manufactured to be particularly rewarding through the addition of fat and refined carbohydrates."