Researchers at the University of California, Berkeley, examined the brain regions that control food choices and found that inadequate sleep makes one crave for junk food.

"What we have discovered is that high-level brain regions required complex judgements and decisions are blunted by a lack of sleep, while more primal brain structures that control motivation and desire are amplified," said Matthew Walker, a UC Berkeley professor of psychology and neuroscience and senior author of the study published August 6 in the journal Nature Communications.

Moreover, he added, "High-calorie foods also became significantly more desirable when participants are sleep-deprived. This combination of altered brain activity and decision-making may help explain why people who sleep less also tend to be overweight or obese."


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