Lactoferrin is one of the components present in milk and colostrum and conferred to newborns from mothers to protect them and to support a still immature immune system. Lactoferrin is an iron binding protein which, sequestering iron ions, destabilizes the membranes of pathogenic microorganisms, inhibiting their growth. It also bears an immune-modulating activity, probably by modulating cytokines production, regulating the production of reactive oxygen species and recruiting and stimulating immune cells.