Microbiome Facts

There are about 1,400 different species of bacteria in your belly button.

About 38 trillion bacteria live in your gut alone—weighing roughly 2 kg. That's heavier than your brain.

Hundreds of different species of microbes live on and in the human body, with the gut alone hosting over 1,000 bacterial species.

You have roughly equal numbers of bacterial and human cells—about 38 trillion of each. You're a 50/50 partnership with microbes.