The present invention relates to complexes of lactoferrin, osteopontin and iron. In particular the invention relates to a composition comprising at least 2 g/kg of lactoferrin-osteopontin-iron complex for use in the treatment or prevention of iron deficiency. An aspect of the invention is a fortified foodstuff comprising a lactoferrin- osteopontin-iron complex. Further aspects of the invention are a process for fortifying a food product with iron and the use of a lactoferrin-osteopontin-iron complex to fortify a food product with iron.