During sleep, DNA repair enzymes are activated and the glymphatic system clears toxic buildup in the brain.

“because when you sleep is actually when you repair a lot of damage DNA repair enzymes get activated at night and also something called the glymphatic system gets activated when you're sleeping and this is really cool so when you sleep you've got cerebral spinal fluid that squirts up from your spine all the way to your brain and all these little M microvessels here that are shown in blue they're intercalating between your neurons and your gleo cells in your brain and they're physically squirting fluid and removing toxic buildup in your brain it's been shown to to to also uh remove the toxic buildup of amalo beta protein which which has been shown to play a role in Alzheimer's disease”