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Gut hormones are chemical messengers made by special cells in the digestive tract that help control digestive functions.

Cystic fibrosis is an inherited, life-threatening disorder that affects multiple organs and is caused by a defective gene that leads to the production of thickened mucus, which clogs airways and the digestive tract.

Once a person is infected, the parasites root themselves in people's digestive tracts.

This means food moves more quickly through our digestive tract, and we often feel very hungry.

L. reuteri, or LR, typically resides in the digestive tract, where it generates lactic acid.