Abstract
Probiotics are a group of microorganisms able to have a positive influence on a host organism when applied in adequate amounts. They are grouped either as: bacteria (mainly Lactobacillus spp and Bifidobacterium) or fungi (Saccharomyces boulardii). Recent studies have revealed many opportunities for their use in several fields of medicine, such as in: reducing the level of cholesterol in the body, cancer therapy, human immune system regulation, skin regeneration, pancreas necrosis, cirrhosis of liver treatment, regulation of post- antibiotic bowel function, constipation and digestive disorders in infants. Probiotics efficacy has also been demonstrated in oral cavity malfunctions. With the use of modern scientific methods, probiotics have the potential to become an important part of the daily diet and a natural drug supplementation in severe diseases.