Active Bifidobacteria cultures (such as B. longum, B. bifidum, B. breve, and B. infantis) are an essential part of the human intestinal microflora in the colon (large intestine). Studies show maintaining a proper balance of bifidobacteria within the colon can help: Support overall digestive and colon health Reduce putrefactive (foul-smelling and potenitally harmful) substances in the colon Maintain regularity and proper stool consistency Promote healhty immune function(Primadophilus Reuteri Pearls by Natures Way)