and large droplets (4-5 µm) (Figure ). The faster lipid oxidation in small droplets compared to large ones is in line with our recent study, in which more lipid oxidation products are present in the smallest droplets present in the emulsions. can deplete oxygen required for oxidation of large droplets (4-5 µm) effectively leading to slower oxidation. Our model calculations show, however, that there should be enough O2 present for large droplets to oxidize independently. Another potential mechanism is the colloidal transfer of oxidation intermediates formed in small droplets to larger ones. This mechanism can promote oxidation in large droplets especially in high oil-in-water emulsions with short distances between packed droplets. In our case, the oil fraction was only 15 wt.%, which is not in favour of effective mass transfer of oxidation intermediates between droplets. Thus, we arrive at the most likely explanation of a difference in the packing of WPI-proteins at the droplet interface introduced by mild and high shear emulsification. These differences in WPI packing have been observed previously in emulsions manufactured with different emulsification methods. In that study, a higher concentration of proteins at the surface and a thicker interfacial layer could be seen by TEM in emulsions prepared with ultra-high-pressure homogenization compared to counterparts prepared by colloid mill and conventional homogenization.