The Human Microbiome is the collection of all the microorganisms living in the human body. Bacterial cells on average are ten times more populous than human cells and have approximately 1000 more genes than present in the human genome. These microbes are generally not harmful to us; in fact, they are essential for maintaining health.
Microbiome studies suggest that oral and gut microbiota affect nutrient acquisition, energy harvest, and myriad host metabolic pathways which can alter carbohydrate, fatty acid, amino acid metabolism. Increasingly, studies have demonstrated that changes in the composition of our microbiomes correlate with numerous disease states, suggesting that manipulation of these communities could be used therapeutically.