Analysis of several studies have confirmed benefit for the administration of L casei 431 to prevent and treat acute - and chronic-diarrhea, antibiotic-associated diarrhea, lactose intolerance, necrotizing enterocolitis in preterm infants, gastrointestinal infections, respiratory tract infections, Candida albicans infections, improve gut immune system, reduce allergies and inhibit the growth and metastasis of some cancers.