Many probiotic strains are found in yogurt, but in widely varying quantities due to the pasteurization process, which kills all natural organisms. Most manufacturers add the good bacteria back into their products after pasteurization, with varying effectiveness. Probiotic supplements are standardized, and in the case of Renadyl™, we guarantee 45 billion colony forming units of the three bacteria will be present in each serving up to the expiration date. That’s a very high level that is study proven to achieve the results you are seeking.