Probiotics may exhibit antiallergic effects by degradation or structural modification of enteral antigens, stabilization of aberrant microbiota, improvement of the gut-barrier function, regulation of the secretion of pro-inflammatory mediators, and development of the immune system. Experimental studies have found that Antiallergic Probiotics exert strain-specific effects in the intestinal lumen and on epithelial cells and immune cells with antiallergic potential. These effects include enhancement in antigen degradation and gut barrier function and induction of regulatory and pro-inflammatory immune responses.