TravelProbio? contains a probiotic blend of Lactobacillus acidophilus, Bifidobacterium lactis, Lactobacillus bulgaricus; fortified with a prebiotic (FOS) for optimum benefit. It is designed to help build the body?s resistance before and during travel by maintaining the balance of a healthy intestinal flora. HealthAid uses special acid & bile resistant strains, which prevent the stomach juices destroying the ingredients before they reach the intestines, ensuring their purity and potency.