This is the first study reporting the changes produced on isoflavone interconversion, protein digestibility and blocked lysine
of UHPH-pasteurised processed soymilk during storage at 4 C. According to our results, UHPH samples showed lower interconversion to aglycones during refrigerated storage in comparison to heat processed samples. This had a positive effect on the sensory properties of the soymilk. In addition, the lesser formation of aglycones in UHPH-processed samples yielded lower percentage of blocked lysine, which is also positive from both nutritional and toxicological point of view. With respect to digestibility, no differences were observed between heat and UHPH pasteurised samples.