The health of the digestive system forms the basis of the overall health of the body. All physiological processes are linked to it, and its dysfunction can lead to potential pathological processes. The use of probiotics is popular but often irrational. Their use must be in line with the latest recommendations, with clearly defined strain origins and purpose of use. The concept of probiotics has surpassed their use as an aid in treating diarrhea or preventing the unwanted effects of antibiotics. Probiotics are immunomodulators, used consistently and constantly, much like how we use yogurt, kefir, or similar products. They have become a daily necessity for modern individuals, from early childhood to late adulthood.