Probulin only uses scientifically studied strains from one of the top labs in the world. On our label, we list the probiotic species rather than the specific strain information which is the conventional way of labeling in the industry. By labeling in this fashion we protect our formula, and prevent consumer confusion especially among those not familiar with probiotic literature who might be unable to evaluate the trial data. We can assure we have done the homework and have selected powerful strains with a proven track record.