The human colon has been considered the most biodense ecosystem in the world, meaning there’s more life concentrated in our colons than anywhere else on Earth.2043 Many probably think that stool is composed primarily of undigested food, but most of it—about 75 percent—is pure bacteria.2044 Trillions and trillions of them—about half a trillion per teaspoon, in fact.2045 We are bacteria factories.
