The present invention relates to a nutrient composition which contains at least a carbohydrate, a lipid, a protein, and a mineral, and is liquid or semisolid, characterized in that the volume-based median size (d50) of particles in the nutrient composition is 5 to 100 μm and water-insoluble particles having a protein insolubilized by a divalent cation are contained as a major component of the nutrient composition, or a nutrient composition which contains at least a carbohydrate, a lipid, a protein, and a mineral, and is liquid or semisolid, characterized in that water-insoluble particles having a protein insolubilized by a divalent cation are contained as a major component of the nutrient composition and the mass of the protein with respect to the total moles of divalent ions forming the water-insoluble particles is 1.5 to 3 g/mmol.