The video concludes with a study that shows how our brain works as a cleansing system. While we are in deep sleep, it was proven that our brain is actually cleaning itself out and letting out all the toxins that were produced during the day. A study conducted by Dr. Jeff Iliff (2016) had results that were eye opening for all researchers doing research on sleep. This study involved a protein that was involved in Alzheimer’s disease, called amyloid beta. This protein is made during the day when the brain is awake and when you are asleep at night the levels of this protein decrease. Dr. Iliff (2016) looked directly into the living brain, and saw that blood vessels that are deep in the brain begin to change at night. The support cells of the brain
