"Lactoferrin (also called lactotransferrin) is a glycoprotein with a molecular weight of about 80 kDa, which was classified as a member of the transferrin family, due to its 60% sequence identity with serum transferrin. Higher levels of lactoferrin were found in colostrum and mature milk. Lactoferrin has been also found in most mucosal secretions such as uterine fluid, vaginal secretion, seminal fluid, saliva, bile, pancreatic juice, small intestine secretions, nasal secretion, and tears. Lactoferrin belongs to the innate immune system. Apart from its main biological function, namely binding and transport of iron ions, lactoferrin also has antibacterial, antiviral, antiparasitic, catalytic, anti-cancer, anti-allergic and radioprotecting functions and properties."