Bifidobacteria are anaerobic (live without oxygen) and reside in the lower intestine. Bifidus Balance+FOS is encapsulated to protect the bacteria from oxygen. Survives stomach acid and implants.* At time of manufacture each capsule contains approximately 2 billion organisms in the following amounts:FOS (FructoOligoSaccharides) 210 mgB. breve R0070 40% 800 MillionB. longum BB536 (morinaga) 40% 800 MillionB. bifidum R0071 15% 300 Million B. infantis R0033 5% 100 MillionTotal 100% 2 BillionOther products from HerbsPro