People who say they are addicted to junk food might not be fibbing, US scientists have discovered.
They carried out brain scans on hungry people and found out that junk food sparked a similar reaction to the effect of drugs on addicts.
The fave food of the people taking part in the experiment included pizza, cheeseburgers, fried chicken and cake.
The findings might help the argument that junk food advertising is helping to drive the obesity problem in the US.
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