One sleepless night weakens resolve in the face of doughnuts

Sleep loss changes brain activity, food preferences

By Laura Sanders, 15:56 PM August 9, 2013

An all-nighter tweaks the brain, weakening people’s willpower and making them more likely to succumb to double bacon cheeseburgers, a new study suggests. The results help explain the link researchers have noted between sleep loss and obesity.

After staying awake through the night in a sleep lab, 23 people looked at pictures of food while undergoing brain scans. When calorie-laden foods such as doughnuts and potato chips appeared, brain activity changed in two ways: People showed a diminished r...

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