The Gut-Brain Axis
Keep the Second Brain in your Gut Healthy
"Gut bacteria manufacture about 95 percent of the body's supply of serotonin, which influences both mood and Gastro-Intestinal activity."
That gut feeling, By Dr. Siri Carpenter, American Psychological Association, September 2012, Vol 43, No. 8
How the Gut's "Second Brain" influences Mood and Well-Being
"The enteric nervous system (in your gut), uses more than 30 neurotransmitters, just like the brain, and 95 percent of the body's serotonin is found in the bowels."
Think Twice, By Adam Hadhazy on February 12, 2010, Scientific American