Sleep: Your Brain’s Nightly Cleanse

Your brain washes itself while you sleep. No joke. When you fall asleep,

your brain shrinks slightly. That creates space for fluid to rush in

and flush out toxic waste. This cleaning system only turns on when you’re asleep.

Skip sleep too often, and that waste builds up. That’s why chronic sleep loss

is linked to Alzheimer’s. Your brain needs sleep to stay alive. Tonight.