Bio-Kult S.Boulardii is an advanced multi-action formulation designed to target both the Immune System and Digestive Tract. This formulation contains the sought-after yeast strain Saccharomyces boulardii, Vitamin D3 to support the normal function of the immune system, and Preplex to feed the good bacteria. It can be taken alongside a course of antibiotics or when travelling. Microorganisms present in the intestine, collectively called the gut microbiota, are essential to our health. Bio-Kult S. Boulardii is designed to support the immune system and digestive function. Our advanced formulation contains much sought-after Saccharomyces boulardii live yeast organisms, which help maintain the natural balance of microorganisms in the gut, vitamin D3, contributes to the normal functioning of the immune system, and Preplex, which feeds good bacteria. The specially selected live ingredients in Bio-Kult S. Boulardii are cryoprotected during the freeze-drying process. That means they can survive stomach acid.