Book excerpt: Gut instinct, gut-wrenching, gut feeling: these familiar phrases show that we are all aware of the connection between our gut and mind, but the bond is far more complex and significant than you might imagine. Having a healthy gut is not only intrinsic to your general wellbeing, it also plays a fundamental role in supporting your cognitive health, which is why nourishing your gut is one of the key ways to achieve a healthy, happy mind.