Junk food cravings mirror brain changes of addiction
The findings suggest limiting "high-glycaemic" carbohydrates that cause blood glucose to surge could help curb overeating and obesity.
Scientists investigated how food intake is regulated by the brain's "pleasure centres", which are known to be linked to addiction.
Functional magnetic resonance imaging was used to observe the brain activity of overweight and obese volunteers for four hours after a meal.
This crucial period has been shown to influence behaviour the next time a meal is eaten.