THE PRESENT INVENTION RELATES TO A METHOD FOR PRODUCING WHEY PROTEINS IN NANOPARTICULATED FORM AND TO THE NANOPARTICULATED WHEY PROTEINS THUS OBTAINED. SPECIFICALLY, THE PRESENT INVENTION PERTAINS TO THE USE OF THESE NANOPARTICULATED WHEY PROTEINS AS EMULSIFIERS, FAT SUBSTITUTE, MICELLAR CASEIN SUBSTITUTE, WHITENING, FOAMING, TEXTURISING AND/OR FILLING AGENTS. FIGURE 1.