(CNN) You've been practicing social isolation for a couple of weeks now, and suddenly you can't stop devouring every sweet thing in sight.

You used to sleep like a rock but now sleep like a newborn -- waking up every few hours, only to find yourself craving even more carbs.

There's a scientific reason behind that behavior: Poor sleep disrupts our ancient endocannabinoid system, responsible for regulating immune response, appetite, metabolism and more; leaving us craving fatty, starchy and sugary foods.

"When you're sleep deprived, you're not like, 'Oh, you know what, I want some carrots,' " said University of Chicago behavioral neuroscientist Erin Hanlon, who studies the connection between brain systems and behavior.

"You're craving sweets and salty and starchy things," Hanlon told CNN in a prior interview. "You want those chips, you want a cookie, you want some candy, you know?"

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