10% HumanObesity, autism, mental health problems, IBS, allergies, auto immunity, cancer. Does the answer to the modern epidemic of Western diseases lie in our gut? You are 10% human. For every one of your cells, there are nine impostors hitching a ride. You are not just flesh and bone, but also bacteria and fungi. And you are more them than you are you. Your gut alone hosts 100 trillion of them and until recently we thought that our microbes didnt matter. This