The concept of probiotics is well known from the time of Greeks and Romans. The term Probiotics is defined as the substances produced by microorganisms that help stimulate the secretion of another. Though the definition has been redefined by many, the most recent and acceptable definition is by FAO/WHO (2001) and has defined it as: Live microorganisms that when being administered in appropriate dose, confer the benefit of health to the receiver. Probiotics are usually found in dairy and non-dairy products, infant formula, dietary supplements, and energy drinks. They are generally recommended for consumption after the antibiotic therapy and help to manifest a positive balance of valuable microbes in the intestine. The most often used probiotic species belongs to Lactobacillus and Bifidobacterium, apart from these some of the yeast Saccharomyces cerevisiae and some Bacillus and E. coli species are also used as they too demonstrated the probiotic properties.