A randomized, double blind, controlled trial will be conducted in general intensive care unit (ICU) in Tehran, Iran. After a full review of the inclusion and exclusion criteria and explanation of the risks and benefits of the study, written consent form will be completed. Intervention patients will be received 20 g/day of colostrum along with enteral formula and control patients will be received maltodextrin along with enteral formula. Patients will be evaluated for plasma endotoxin and plasma zonulin.