About bowels What is the gut? What is the gut? And they do an amazing job for us. It's long been know that the digestive system does just that; captures essential nutrients from our food and expels waste, but the other ways in which our guts are essential to our overall wellbeing are only really beginning to be understood. From new work on the microbiome and understanding the trillions of bacteria that make us who we are to understanding the role of the gut and its associated hormones in conditions from obesity to Parkinsons and the gut/brain communication super highway, the true wonder of the gut is beginning to dawn on us.