Heat-treated liquid enteral nutritional composition with a low monovalent metal ion content are provided that contain micellar casein and optionally caseinate, and in which the total amount of monovalent metal ions is less than 25 mg/g of protein. Also, heat-treated liquid enteral nutritional compositions are disclosed comprising 10 to 20 g of protein per 100 ml of the composition, in which all or a major part of said protein comprises micellar casein. Also, a method is disclosed for producing the composition according to the invention, comprising a step wherein an aqueous protein solution in which all or a major part of said protein comprises micellar casein, is subjected to an evaporation step.
