The invention relates to a liquid nutritional composition comprising (a) 2-25% by weight of a calcium-depleted milk protein concentrate (MPC) that has undergone a heat treatment to at least 80.degree. C. and has between 15-45% by weight of the calcium removed; (b) 0-30% by weight fat; (c) 5-45% by weight carbohydrate; wherein the nutritional composition has a viscosity of less than 200 cP at a temperature of 20.degree. C. and shear rate of 100 s.sup.−1, and has an energy density of at least 0.5 kcal/ml, and wherein protein provides 10-40% of the total energy content of the composition. Also provided is a powdered composition dispersible in water to form the liquid composition.