For adults looking for a highly potent probiotic to support digestive, colon and immune system health every day, Dr. David Perlmutter created Once Daily Ultra. This formula delivers 90 billion CFU from 15 diverse and hardy probiotic strains which can survive in the gut, including clinically researched strain L. acidophilus NCFM® as well as Lactobacillus plantarum, L. rhamnosus, L. acidophilus, Bifidobacterium lactis, B. bifidum and B. longum—all in one capsule a day. Prebiotics help feed good bacteria in the gut, and we have included an Organic Prebiotic Fiber blend with Organic Potato and Organic Acacia (A. senegal) to help beneficial bacteria to thrive.† Dr. Formulated Once Daily is proudly Third-Party Certified Non-GMO Project Verified and NSF Gluten-Free, as well as Vegetarian and Hypoallergenic (Dairy Free, Gluten Free, Soy Free and Wheat Free). The Doctor behind our Doctor Formulated line is David Perlmutter, M.D., America's Brain-Health Expert, a Board-Certified Neurologist, #1 New York Times best-selling author, Fellow of the American College of Nutrition, and expert in the human MICROBIOME.