Microbial communities can have significant impact on the brain and mental health states. As we learned in class probiotics had a positive effect on cognitive function which was in part shown by a decrease in stress. Stress might act as a catalyst for dysbiosis especially chronic stress as it creates an increases the likelihood of an immune response. Through this, certain bacteria which are very opportunistic would take advantage and cause bodily harm. In the same way that bacteria can help us in reducing stress and feel more mentally flexible, the stress that we may put on ourselves would open the doors for bacteria that provide no benefits to us and ultimately make us more prone to diseases whereas probiotics would make us less prone to disease as we would have less stress as a result.