Did you know that there is a close relationship between happiness and the bacteria in our gut? That a good intestinal transit helps to have good mental health? That the microbiota has a fundamental role in your health, in the prevention of diseases and that it strengthens your immune system? Dr. de la Puerta, one of the leading experts in the field, offers you the definitive work on the microbiota and demonstrates, based on her extensive clinical experience and scientific research, the connection between the intestine and the brain. In these pages we will know, in a simple way and full of practical examples, what the microbiota really is, how we can take care of it and what habits are necessary to balance it from diet, exercise, sleep, digestion, stress, inflammation. The microbiota is destabilizing the approach that traditionally connected mental health only with the brain. Today we know that the head is not the only cognitive organ. There is evidence that the intestine is permanen