There is a lot of interest in medical research on how the human biome (the trillions of bacteria, fungi, viruses et. al. in our gut) affect our physical and mental health. Do products from the biome "cause" obesity, arthritis, depression, dementia and the list goes on and on? We'll look at what we know and how scientists are exploring the connection between the biome and health and how we might change the pattern of bacteria in our biome.