These lactobacillus acidophilus capsules contain a combination of 3 billion bacterial cultures from the lactobacillus and bifidobacterium family. Acidophilus is a type of ‘friendly’ bacteria that lives in the gut, mouth and vagina. These acidophilus pills contain bacterial cultures including lactobacillus acidophilus, bifidobacterium animalis subsp. lactis, lactobacillus bulgaricus and lactobacillus salivarius, along with pectin.