Although Dr. Bredesen has recommended Lactobacillus plantarum, Lactobacillus brevis and Bifidobacterium lactis in the past, he and our product formulators chose to use Lactobacillus helveticus, Bifidobacterium bifidum, and Bifidobacterium breve instead. These three probiotic strains provide similar or superior gut health benefits and have consistently proven to have a stronger stability profile. Shelf-stable ingredients help to protect the potency and integrity of the ReCODE supplements.