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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.

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Thumbnail: How to Use Probiotics for Digestive Health

A guide to getting the most from probiotics for digestive health, including whether to use supplements, foods, or yogurt.

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