Have you ever had a “gut feeling”? That moment when you just knew? If you’ve ever “gone with your gut” to make a decision or felt “butterflies in your stomach,” did you ever wonder why that was? Hidden in the walls of the digestive system, this “brain in your gut” is revolutionizing medicine’s understanding of the links between digestion, mood, health, and even the way you think. Scientists call this little brain the enteric nervous system (ENS). And it’s not so little. The ENS is two thin layers of more than 100 million nerve cells lining your gastrointestinal tract from esophagus to rectum.
