Each of us is a unique ecology. In addition to our human cells we have 10 times that many cells that are bacteria and they have a great deal to do with your state of health or disease.
When we are sad or happy it’s not just going on in the brain it’s all this collective ecosystem. The brain has probably more nerves cells in your large intestines than in any other part of the body. So there is this super highway of nerve cells between the brain and the gut and that’s why people say go with your gut, because it’s almost like your second brain.