For Digestive Health16 Strains20 Billion CFU†Dietary SupplementVegetarianDesigned with Prebiotic FOS to Support ProbioticsScience-Backed Quality Since 196916 strains carefully selected based on their specific roles in supporting digestive health.Swanson Probiotic for Digestive Health helps support digestion with 16 carefully selected strains so you can feel your best. Your digestive tract is a diverse ecosystem, home to billions of microorganisms. The “good ones,” known as probiotics, provide valuable support for healthy digestion, immune function and many other vital processes throughout the body. Probiotics help establish and maintain a healthy balance of bacteria in the GI tract by increasing the population of beneficial strains. Prebiotics, such as fructooligosaccharides (FOS), enhance this activity by supporting probiotic organisms to ensure that they thrive. †Contains 20 billion CFU (colony forming units) when manufactured, and provides an effective level of bacteria until at least the "best by" date.