Ideal for use during or post-antibiotic use to support normal bowel movements Ultra Probioplex™ Duo is a unique duo combination of Saccharomyces boulardii and live bacteria that has superior stability. This formula contains 8.5 billion extensively researched live bacteria strains and 6 billion Saccharomyces boulardii. It is ideal for those taking antibiotics, because Saccharomyces boulardii, as a yeast, is not inhibited or killed off by antibiotics; and it helps to support a healthy balance of microflora following antibiotic use with a combination of 4 different live bacteria strains. Ultra Probioplex™ Duo also contains vitamin D which contributes to the normal function of the immune system. This formula features ProtectAir™ technology which guarantees the number of live bacteria and their quality without refrigeration until the expiry date, making it ideal for travelling.