Americans have an incredible love of cheese. In fact, many European countries also include cheese as part of their daily diet. Researchers are suggesting that It may be that cheese contains a tiny bit of an addictive substance. Casein is a concentrated milk protein, which occurs during cheese making and converts to a morphine-like chemical called beta-casomorphine 7 after digestion. Interestingly enough the chemical that is produced naturally seems to encourage calves as well as human babies to crave milk so they are more likely to nurse. In cheese the level of casomorphine is more concentrated which is why the addictive effect may be greater.