The gastrointestinal (GI) tract is not only the place where food gets digested and absorbed, but it is also our immune system’s first line of defense. The GI tract serves as a physical barrier that prevents potentially harmful substances, pathogenic microorganisms, and undigested proteins from entering the body. This multi-functional organ contains a significant amount of immune tissue, produces protective antibodies, and also plays a role in detoxification.Keeping our GI tract intact is crucial to maintaining our health and well-being. Permeability is key to the function of the GI tract; it must be permeable enough to allow vital nutrients through, but not too permeable to allow unwanted substances into the bloodstream.Many factors affect GI permeability in a negative way, including alcohol, drugs, toxins, oxidative stress, pathogenic microorganisms, and even the immune response itself.GI tract cells divide rapidly, and the gastrointestinal epithelium is literally replaced every three to six days. This fundamental process requires a significant amount of energy and nutrients, as well as a balanced and thriving ora of beneficial microorganisms.OPTI-GI™ contains a complementary blend of nutrients, herbs, and a probiotic yeast to support the integrity, health, and metabolism of the gastrointestinal tract.* It also contains immunoglobulins, patented glutamine, special pectin fibers and powerful herbs.