Do you feel a sense of euphoria after eating chocolate? Learn why certain cocoa is extremely beneficial. Many people report a feeling of well-being - even euphoria - when they consume a bar of chocolate.A recent study in the Journal of Psychopharmacology explains why. Cocoa contains natural chemicals that can actually increase calmness and content. But beware... any old mug of hot cocoa can’t bestow Nirvana.The key factor, according to researchers, is the amount of polyphenols contained in the cocoa. Learn the facts on chocolate's benefits from Harvard researcher, Dr. Eric Ding.