Hi, I searched for that too, after I had read a study, that it might slow down the progress. I called the provider in Canada, but since it was just a study, they would not provide it to the public. So I found only that bacillus in Greek Joghurt, but no idea what strain. I fed my husband that through the feeding tube and was glad to have it, because we had problems with delivery of his formula, otherwise he would have had to fast. The nice side effect was a regular bowel movement