This unique 4-in-1 probiotic product is formulated with 4 registered strains of viable organisms, total 40 billion CFU including Bifidobacterium brevis M-16V, Bifidobacterium lactis HN019, Lactobacillus rhamnosus HN001 and Bifidobacterium animalis Bb-12. In addition, we use special technology that are optimized to help prevent probiotics from being damaged by environmental factors and/or human digestive system such as cold temperature and stomach acid, allowing them to reach the small intestine for maximum effectiveness.