Indeed, different milk proteins like casein, lactoperoxidase, lactoferrin, α-lactalbumin, and its complexes (i.e., HAMLET (Human Alpha-lactalbumin Made LEthal to Tumor cells), BAMLET (Bovine Alpha-lactalbumin Made LEthal to Tumor cells)), have garnered attention for the ability to block tumor growth, their effects on cancer gene expression, and their cytotoxic activity against certain cancer cells [39]. Here, LPO is linked to cancer.