Necrotizing enterocolitis (NEC) is the most common gastrointestinal catastrophe affecting 10-15% of premature neonates of <1500 gm. NEC is a disease of the immature intestine, characterized by impaired mucosal barrier function leading to increased gut permeability. We have previously demonstrated a protective effect of probiotic administration against the development of NEC. Others have shown that prebiotics can stimulate natural production of bifidobacteria and lactobacillus in the preterm gut. We have therefore hypothesized that prophylactic administration of prebiotics would also provide protection against necrotizing enterocolitis in the premature neonate, without the potential for sepsis which has been reported on rare occasions with probiotics administration.