"Quest TumBiotix contains a unique combination of the probiotics L.plantarum and L.acidophilus, which are ""friendly"" probiotic lactic acid bacteria that normally exist in the human gut. The combination of L.plantarum and L.acidophilus has been shown by scientific studies to be able to reduce the symptoms of Irritable Bowel Syndrome (IBS) and therefore offer significant support to those suffering from this syndrome. TumBiotix helps maintain an ideal ratio of probiotic bacteria in the gut in order to contribute to the health and proper functioning of the gut, as well as the body's defenses by protecting against the growth of pathogenic microorganisms in the gut."