Have you ever had “butterflies” in your stomach before a big event? Or lost your appetite during a stressful time? These are real signals from your nervous system, and they show how closely connected your gut and brain really are. In fact, researchers now refer to the digestive system as the “second brain” because of the large network of nerves that governs it. But for your digestive system to function properly, those nerves need to communicate clearly with your brain. That’s