Carboxymaltose iron is a new type of intravenous iron agent. It is a complex (codenamed "VIT-45") formed by the encircle of the trivalent polynuclear iron core (β-FeOOH) by carboxyl maltodextrin (i.e. the oxidation product of maltodextrin). This core-shell structure can stabilize the iron complex and control the release of iron. Therefore, it can prevent toxic oxides caused by excessive blood iron concentration of iron transporters and iron egg Chemicalbook white saturation.