yogurt containing polydextrose, Lactobacillus acidophilus NCFM and Bifidobacterium lactis HN019
The product containing yogurt with polydextrose, B. lactis HN019 and L. acidophilus NCFM® significantly shortened colonic transit time after two weeks

Meta analysis: Bifidobacterium lactis works best, Lactobacillus casei Shirota not so good