![](https://image.tmdb.org/t/p/w92/dId5HXN0ppDod6xL8jkUvxuoQHu.jpg)
Hidden deep in our guts, billion bacteria keep us healthy. Although invisible to the naked eye, they could revolutionise the future of medicine. This might happen, if they don't disappear because of our modern lifestyle.
Sylvie Gilman,
Added on Amazon Prime 2023-03-28.