Apr 11, 2015
A study conducted at the University of Rochester Medical Center, researchers discovered that it's during sleep that the brain clears out potential harmful waste that builds up during the day.
As you sleep your brain pumps spinal fluid into the brain to "flush out" waste into the circulatory system and eventually to the liver for removal. Because this process is very energy intensive, it's difficult for the brain to perform it during the day while already over-active and preoccupied with performing every day tasks.
Instead, researchers found that sleeping brains were able to clear out much more amyloid-beta, the plaque-building protein associated with Alzheimer's disease.
If you want to keep your brain healthy and free of toxins, strive for 7 - 8 hours of sleep each night.