Saccharomyces Boulardii 

5 Billion CFU is a probiotic yeast which survives passage through stomach acid and delivers its benefits to the intestinal tract. It provides enhanced support to the intestinal tract. (9) It also works to restore the normal intestinal microflora when possible disruptions may occur, such as during travel or the intake of certain medications. (10) This strain helps protect and maintain a normal intestinal microflora. (11) S. Boulardii Probiotic provides a synergistic effect to probiotics by supporting the growth of beneficial bacteria in the intestinal tract. (12)

9. J Trop Pediatr. 2016 Jun 9. pii: fmw032

10. Aliment Pharmacol Ther. 2015 Oct;42(7):793-801

11. Arq Gastroenterol. 2013 Oct-Dec;50(4):304-9

12. World J Gastroenterol. 2010 May 14;16(18):2202-22