Probiotics are live microorganisms which when administered in adequate amounts, provide a health benefit on the host ((Health and Nutritional Properties of Probiotics in Food Including Powder Milk with Live Lactic Acid Bacteria - Cordoba Argentina October 2001). Data from experimental and clinical literature show a significant effect of probiotics on the improvement of liver function and a decrease in infectious complications in patients with chronic liver disease. The proposed study would evaluate the effect preventive and therapeutic in a population of surgical patients, in whom the intestinal portal and hepatic inflammation promotes postoperative complications.