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It has been known for a while that we are hosts to a multitude of bacteria and their preferred breeding ground is our gut where the majority of them reside, also known as the gut microbiome. Initially it was thought that they only help us with our digestion but in recent years researchers have found that the bacteria in our gut communicate with the brain and vice versa. A lot of research is underway to find out exactly how this communication takes place, how the food we eat is altering our gut bacteria, and the signals they send to the brain.