Complex cycles and systems operate in the brain. The Glymphatic (or Glial Lymphatic) system, discovered recently, takes care of the brain waste much like a complex sewer system.

It affects our learning, metabolism, hypertension, insulin sensitivity, and of course, mood.

• Quality sleep is the one universal factor that can keep our brain healthy.
• Sleep is so important that mammals die in about a week if they are completely deprived of sleep.
• While we think our lights are out when we sleep, our brain is very much active and uses a lot of ener...