Probiotics support gut health. Here are some of the most researched probiotics: Saccharomyces boulardii is a gentle yeast and for those with Diarrhoea. Bifidobacterium lactis BB-12® for constipation and helping you poop. Lactobacillus acidophilus NCFM® and Bifidobacterium lactis Bi-07 for bloating, Bifidobacterium infantis 35624 for pain and bloating, L. plantarum Lp299v for regularity and discomfort.