It is yet to be determined whether the proportions of the most abundant whey proteins impact growth and BC development, in particular lysozyme, which may act via promotion of the colonization of infant gut by the infant-type human-residential bifidobacteria [62] and via change in gut microbiome composition through both, detrimental microbe reduction and beneficial microbe enrichment as shown in porcine model [63]. Here, LYZ is linked to breast cancer.