Probiotics are preparations containing live microorganisms that support the proper functioning of the digestive and immune systems. They work well m.in as a cover during antibiotic therapy and support in the treatment of irritable bowel syndrome, infectious diarrhea or constipation. Vegan probiotics containing strains of bacteria are available in pharmacies, such as Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus reuteri, Lactobacillus rhamnosus, Bifidobacterium breve, Bifidobacterium lactis and yeast Saccharomyces boulardii.