Directions For your initial discussion post, research human diseases, longevity

Directions
For your initial discussion post, research human diseases, longevity or infant health that have been shown to be impacted by deficiency of, or an imbalance of, our gut microbiota, and tell us your beliefs on the accuracy of the claims. How can we best utilize this knowledge in our own lives? Can we help those we love with their health issues by helping to modify their gut microbiota?