probiotic

Definition / meaning of probiotic

A live microorganism used as a dietary supplement to help with digestion and normal bowel function. It may also help keep the gastrointestinal (GI) tract healthy. A bacterium found in yogurt called Lactobacillus acidophilus, is the most common probiotic.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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