Probiotics and Gut Feelings

So describe to me what happens when you have an overgrown untended gut garden and you start introducing probiotic prebiotic foods into your system. What's going on down there? I'm really exploring in my new book called gut feelings because it's a conversation that I'm always having with my patients this sort of bi-directional relationship between mental health and physical health. so they're it more isn't always better there there should be done judiciously to tolerance and a little goes a long way is a good way of putting it.