Chocolate, native to Central and South America, originated from "xocolatl", which means "bitter water". Its main raw material, cocoa beans, is produced in the narrow strip within the equator latitude 18.

The main ingredient of chocolate is cocoa butter, which contains theobromine which is toxic to many animals. However, for human beings, theobromine is a healthy anti-sedative ingredient, so eating chocolate has the function of refreshing and enhancing excitement. Cocoa contains phenylethylamine, which is rumored to make people feel in love.