This Is How Probiotics Can Improve Your Gut Health

Fermented foods contain beneficial bacteria that take up residence in your gut and help keep you well. marekuliasz/Shutterstock

To understand probiotics, it’s important to first understand what’s in your gut.

Your gastrointestinal tract is lined with a vast community of microorganisms known as “gut flora,” “microbiome,” or just “gut bacteria.” In humans, there are a larger number of bacteria in the gut microbiome than anywhere else in the body.