An iron composition comprising a milk protein and an iron-containing substance, which is characterized in that it is stable in the presence of a substance capable of releasing iron from the composition or capable of reducing the released iron and a drink, food or animal feed having the iron composition blended therein. An iron-containing substance is blended with a milk protein (e.g., defatted milk), thereby producing the iron composition which is stable in the presence of a substance capable of releasing iron from the composition or capable of reducing the released iron (e.g., vitamin C, citric acid).
