β-Lactoglobulin (β-LG) is a small globular protein consisting of 162 amino acid residues that belong to lipocalins, which are potential regulators of cellular communication. [1][2][3][4] The β-LG has an antioxidative activity, but its potential does not exceed that of vitamin E and probucol. 2 Moreover, β-LG is an efficient transporter of molecules with antioxidant and anticancer properties, including phenolic compounds, vitamins and many others. 1,[5][6][7][8] The β-LG is a major component of ruminant milk of most species, except for humans, guinea pigs, rabbits and rodents. Thus, the biological role of β-LG is considered regarding its nutritional profile and/