Clinically Proven Bifidobacterium For Intestinal Environment Improvement and Constipation, Stimulates Immunity, and more. We’re providing Bifidobacterium longum BB536, Bifidobacterium breve M-16V, Bifidobacterium infantis M-63, and Bifidobacterium breve B-3. We also have heat treated Lactobacillus paracasei MCC-1849.