Human milk constitutes the best form of newborn alimentation because of its nutritional and immunological properties. Maternal milk consists of proteins, lipids, carbohydrates, and mineral and vitamin elements in adequate quality and quantity for the development of the newborn (Picciano, 2001; Lawrence and Pane, 2007). Furthermore, human milk contains a complex mixture of immunologically active components providing both specific and nonspecific defenses against infectious agents. The main specific defense is represented by high levels of IgA, which confers passive immune protection to the neonate (Adkins et al., 2004). Other bioactive substances present in breast milk with immunomodulatory potential include a variety of growth factors and cytokines