Formulated with 4 strains of healthy bacteria. Contains prebiotic fibers & the healthy bacteria that can decline with age. Supports: healthy intestinal balance; digestive health; immune system function. 20 Billion live bacteria cells per capsule. Compare the differences of CVS Health maximum strength probiotic to culturelle. CVS Health maximum strength probiotic: L. Rhamnosus strain: L. Rhamnosus A191; Lactobacillus probiotic blend: L. Rhamnosus, L. Acidophilus; Bifidobacterium probiotic blend: B. breve, B. longum; Total live probiotic cells per capsule: 20 Billion (contains a minimum of 20 billion live bacteria when manufactured, and provides a minimum concentration of 10 billion at expiration date). Culturelle: L. Rhamnosus strain: L. rhamnosus GG; Lactobacillus probiotic blend: L. rhamnosus GG; Total live probiotic cells per capsule: 10 Billion (guaranteed potency through date on box when stored according to instruction on Culturelle package). One capsule a day helps support a healthy intestinal tract and immune system. The human digestive tract is colonized by trillions of health-promoting friendly bacteria that ensure maintaining natural flora balance between all bacterial species living inside the intestinal tract. Maintaining a balanced microflora is important not only for overall digestive health, but also for promoting natural regularity. CVS Health maximum strength probiotic is a source of probiotic friendly bacteria that, when taken daily, will help maintain healthy intestinal flora balance. It contains a high concentration of lactobacillus rhamnosus, one of the most studied probiotic species. It also contains inulin, a prebiotic supporting friendly bacteria growth. Dietary supplement One-a-day Contains prebiotic fibers CVS Health quality Gluten-, dairy- and soy-free Made in Canada