On the other hand, it also contains a high level of phenolen that lowers the risk of heart disease! What about the caffeine? A standard bar of milk chocolate contains the same amount of caffeine as a cup of decaffeinated coffee. Also, after much intense investigation researchers have found the real answers. Chocolate does not cause or irritate acne. It does not cause migraines. And the cocoa butter in chocolate coats the teeth while it’s being consumed making it one of the least likely snacks to cause tooth decay.