Our Extra Strength Probiotic provides an effective dose of sixteen carefully selected beneficial microbial strains to support intestinal and immune health.** The strains that are used in this diverse blend include a range of bifido- and lactobacillus bacteria that are known to preferentially colonize the upper and lower gastrointestinal tract.** Our customized MICROBAC™ live transport system increases the stability and delivery of our probiotics, providing the colonization and activity of 125 billion cells to support your gut microbiome.**