There's also, possibly, the flushing out of toxins in the brain: http://www.nih.gov/news/health/oct2013/ninds-17.htm http://www.nih.gov/news/health/oct2013/nin

There's also, possibly, the flushing out of toxins in the brain: http://www.nih.gov/news/health/oct2013/ninds-17.htm http://www.nih.gov/news/health/oct2013/ninds-17.htm