For the new study, scientists scanned the brains of 15 individuals when they were drinking diet drinks, and compared them to regular beverages. They also monitored how much energy was burned by the body.
They discovered when there was a ‘mismatch’ between sugars and sweetness – as is frequently the case with diet drinks or meals because they are less sugary – the calories fail to activate the body’s metabolism. Reward circuits in the brain also did not register that calories were consumed, which might lead to eating more.
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