Researchers say a part of the brain usually associated with movement may also control our response to cravings.
Researchers from the University of Michigan offered lab rats an unlimited amounts of M&Ms.
They also stimulated an area of the rats' brains that they suspected was related to craving. They discovered the rats ate more than twice as many candies as they would have otherwise.
Their findings, published in the journal Current Biology, reveal the stimulant given to the rats, which is similar to the endorphins our bodies produce naturally, did not make the chocolate more pleasurable to the rats. It only made them want to eat more of them.