There seems to be a lot of connections between gut bacter a and mental health. The key thing about maintaining proper t bacteria is not taking probiotics every day. It's eating the right foods. We have ten times as many bacterial cells in our body as we have human cells. So why is the elimination diet important? Probably because it promotes triptophan and serurgors. That's my belief that the mechanism of action of irvetic diets is through dietary intervention.