What does a sudden and passionate desire to eat a certain product mean?

Did you have to get up in the middle of the night with an overwhelming desire to eat a cheese sandwich, such as a sausage, a piece of chocolate, or something else?
Every person at least once in his life had an inexplicable craving for any particular product. One of the most popular theories says that this phenomenon is related to the lack of certain substances in the human body, and we want exactly the products that these substances contain.
And how does science explain this phenomenon? Continue reading →