New science proves that saying you've got a "gut feeling" is actually pretty accurate—especially if you're a man. Learn more about the impact of these bacteria.
The intestine is a very large organ that is populated by so many bacteria that there are more cells in the intestine than in the rest of the body. Learn more about the beneficial gut bacteria in the intestine.
Reviews bacteria which are beneficial to other organisms.
This webpage about the useful single-celled organisms known as bacteria includes an interactive that gives examples of the benefits of bacteria.