Common events in everyday life, such as diet, travel, stress and some medications, can cause an imbalance in your digestive system. Probiotics are "friendly" bacteria that help restore the balance in the intestinal tract, there by aiding normal digestion, supporting the immune system and promoting overall health. The strain used in CULTURELLE®, Lactobacillus GG, is the most clinically researched strain and proven to improve digestive health. CULTURELLE® is an all-natural dietary supplement containing the health promoting benefits of Lactobacillus GG. It is clinically proven at major US and European institutions to maintain a healthy intestinal tract and strengthens the body's natural defenses. If you are having regularity issues, traveling or simply want to promote your health, taking CULTURELLE® daily will maintain the health promoting "good" bacteria in your intestinal tract. This is important because the intestine are the largest immune organ in the body and promoting their health strengthens your body's overall natural defenses.