Microbes

Escherichia coli Nissle 1917 (N) is a rare, non-pathogenic strain of E. coli discovered during World War I from a soldier who did not get dysentery while others did. Unlike harmful E. coli, N acts as a probiotic: it settles in the gut, competes with bad bacteria for food and space, produces natural antimicrobials, and even helps strengthen the gut barrier.