Finally, there’s proof that beauty sleep is no myth.

In this study, a team of Swedish researchers photographed twenty-three healthy adults under two conditions: fully rested and sleep deprived. Researchers showed the photos to a separate group of 65 untrained observers who rated the photos for health, attractiveness and tiredness. 

Overall, observers thought sleep deprived subjects looked more tired, less healthy and less attractive—and that’s after just one night!

A good night’s sleep, 6.5-8 hours, leads to better health, a longer lifespan and a bright-eyed, beautiful you. So rest up, sleeping beauty, and tuck in early tonight.