Your gut microbiome consists of billions of organisms from many thousands of species. Your gut biome consists of about three pounds of tiny single-celled microbes living in your gut which have a profound effect on your health.
These gut microbes can be grouped by phylum into firmicutes, bacteroidetes, actinobacteria and proteobacteria, fusobacteria and verrucomicrobia. The population ratios of these organisms are determined by our exposure to the environment. And, the diversity of bacterial species and the ratios of these organisms can determine your health are associated with various negative bodily conditions, including obesity.
Your body is covered with microbes from the outside on your skin into your mouth and all along your gastrointestinal tract. About 700 bacterial species may live in your oral cavity alone. Some of the factors that determine the makeup of your body’s microbiome are: