Skip to content

Probiotics are "good" bacteria that help the body's digestive tract. Prebiotics are food ingredients that help support growth of probiotic bacteria. Follow the links below to find WebMD's comprehensive coverage about what probiotics and prebiotics are and how they work.

Medical Reference

Features

Thumbnail: What Are Probiotics?

An overview of probiotics – their benefits and how they work, supplements and foods with probiotics, the best probiotics for different conditions, and possible side effects.

Read Full Article

Video

Slideshows & Images

Expert Commentary

More From WebMD

News Archive

Healthy Recipe Finder

Browse our collection of healthy, delicious recipes, from WebMD and Eating Well magazine.

Top searches: Chicken, Chocolate, Salad, Desserts, Soup

Heart Rate Calculator

Ensure you're exercising hard enough to get a good workout, but not strain your heart.

While you are exercising, you should count between...

-
Beats
PER
Seconds