Bulacol 500 is a nutritional supplement based on probiotic yeast called Saccharomyces boulardii (S. boulardii) in the form of capsules. In the human intestines, S. Boulardii contributes to the preservation of the health and function of the digestive tract by its activity, that is, it alleviates the intensity and duration of stomach ailments such as diarrhea, nausea, stomach pain.