Researchers at the University of California School of Medicine selected 36 healthy women between the ages of 18 and 53 as subjects. In the one-month study, participants were randomly divided into three groups: Group A drank two cups of probiotic yoghurt per day; Group B drank dairy products without probiotics; Group C did not eat any dairy products. All women who participated in the study underwent brain MRI scans at the beginning and end of the study. As a result, it was found that the regional activities responsible for the treatment of cognition and emotion were reduced in the female brains of the probiotic yoghurt, and the activities of the other two groups of female brains did not change or the activities were significantly more active. Dr. Meyer’s analysis pointed out that this result shows that intestinal health and brain health interact. Yogurt helps to improve mood while changing the human intestinal flora.