In the neonatal intensive care unit, human milk is preferred food for preterm and very preterm infants. For very premature infants (less than 30 weeks), it is well established that human milk reduces the risk of necrotizing enterocolitis (NEC), a bacterial infection of the intestines with devasting consequences, and is associated with improved growth, cognitive development, and survival compared to infants receiving formula. There’s just one problem: donor milk, used when an premature infant’s mother’s own milk (MOM) is not available, generally consists of pooled and pasteurized milk from several donors. Donor milk – the second best food for premature infants after milk from the infant’s own mother – is suddenly missing one OR MORE of the factors in human milk that is thought to protect against NEC and other gastrointestinal infections. But, what would happen if you incubated donor milk with unpasteurized milk, from the infant’s own mother?