The 57 percent. Mazmanian added: “Bacteria far outnumber fungi and other microbes, and most of these microbes are found in the gut, thus almost all of the 57 percent are intestinal bacteria.” In laymen’s terms? The 57 percent is all sh*t you’ve been told to steer clear of your entire life. Yes, seriously.
Essential. As icky as they may sound, these, um, things are important for your overall well-being. "They are essential to your health," Professor Ruth Ley, the director of the department of microbiome science at the Max Planck Institute, told the BBC, "your body isn't just you."
Microscopic creatures. No matter how well you shower, your body is always covered in these microscopic creatures. "This includes bacteria, viruses, fungi and archaea (organisms originally misclassified as bacteria),” the BBC explains. "The greatest concentration of this microscopic life is in the dark murky depths of our oxygen-deprived bowels."