Multi-Strain Probiotic with Saccharomyces boulardii n Tri-Flora Plus ™ is a breakthrough combination probiotic formula providing a concentrated synergistic spectrum of Saccharomyces boulardii (SB), Lactobacillus and Bifidobacterium. NuMedica ® has chosen the world-renowned Institut Rosell in bringing you the select strains in this formula. Tri-Flora Plus ™ fortifies a healthy immune environment with SB and at the same time replenishes beneficial flora in the intestinal tract.* The three bacteria strains in this formula are proven to be resistant to gastric acidity and bile salts.*