Or after a big night out?

(Time) Why You Crave Junk Food When You’re Sleepy

By AUDREY YOO | June 11, 2012

Researchers say sleepy brains associate junk food with reward and pleasure.

Junk food is more appealing to people who are sleep-deprived because sleepy brains associate junk food with reward and pleasure, said researchers at the annual Associated Professional Sleep Societies meeting. The sight of junk food, however, does not activate the reward centers of well-rested brains in the same way.

In other words, when you’re sleepy you’re more likely to succumb to eating unhealthy food.

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