The invention relates to the use of one or more nucleotides for improving the heat stability of an aqueous micellar casein composition comprising 6 to 20 g per 100 ml of micellar casein, and having a pH of about 6 to 8. The invention also relates to heat-treated liquid nutritional compositions comprising 6 to 20 g, preferably 9-20 g, of protein per 100 ml of the composition and having a pH of about 6 to 8, in which all or a major part of said protein comprises micellar casein, further comprising one or more nucleotides.
