A new study conducted by researchers at University of Michigan reveals that chocolate has the same effect on a part of brain as opium

“This means that the brain has more extensive systems to make individuals overconsume rewards than previously thought.
The same brain area tested here is active when obese people see foods and when drug addicts see drug scenes. It seems likely that our enkephalin findings in rats mean that this neurotransmitter may drive some forms of over-consumption and addiction in people”, lead researcher Dr Alexandra DiFeliceantonio said. The study has been published in the journal Current Biology.
Source-Medindia