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Gut Barrier

Meaning

The Gut Barrier refers to the sophisticated physiological interface within the gastrointestinal tract, comprising a single layer of epithelial cells, their intercellular tight junctions, an overlying mucus layer, and the underlying immune system. This critical boundary selectively permits the absorption of nutrients and water while stringently preventing the passage of harmful bacteria, toxins, and undigested food particles from the intestinal lumen into the bloodstream.