Fast Company writes about how staying up all night to finish a work project may backfire. Sleep Review editorial board member Emerson Wickwire, PhD, is quoted.

When running up against a deadline, pulling an all-nighter may seem your only option to complete a project, but a recent study published in the Swedish journal, Sleep showed that, rather than boosting productivity, staying up all night is actually harmful to your brain.

The researchers measured blood levels of certain proteins associated with brain injuries such as concussions and found protein levels were 20% higher in those who pulled all-nighters compared to when they got a full night’s rest. Although not as high as protein levels post-concussion, the study proves skimping on sleep can do real brain damage.