Get the one that started it all! Dr. Shahani's Original L. Acidophilus has the DDS-1 strain of L. Acidophilus originally developed in the 1950s by Dr. Khem Shahani and his team at the Department of Dairy Science, University of Nebraska. Now by special arrangement with Nebraska Cultures, the company Dr. Shahani founded to bring his remarkable probiotic to the public, Swanson is able to offer Dr. Shahani's original strain of acidophilus to you at a remarkably affordable price. Among all the strains tested by University researchers, only the DDS-1 strain of L. acidophilus met every necessary criteria for a beneficial probiotic while simultaneously maintaining the stability necessary to produce a commercial product. If you take acidophilus, or if you think you might benefit from the digestive assistance, immune support and other properties of this important probiotic, Dr. Shahani's Original L. Acidophilus is the perfect choice for a product you can rely on day in and day out.