The microbiome is one of the most exciting discoveries of 21st century biomedicine, and scientific heavyweights as prominent as Craig Ventner, whose company sequenced the human genome, are now sequencing the microbiome. The microbiome is the ecological community of commensal, symbiotic, and pathogenic microorganisms that literally share our body space–the mass of trillions of microbes that live on and in your body. Most of them are in your large intestine, but they thrive in your mouth, on your skin, and even in your bloodstream. The human gut contains on average: 40,000 bacterial species, 9 million unique bacterial genes and 100 trillion microbial cells. These hundred trillion microbes render us a walking, breathing ecosystem–more microbe than man.