Iron-carbohydrate complex compounds (I) in which the content of iron(II) is at least 2 wt.% of the total iron content. Independent claims are included for (1) a method for the production of (I) by (a/b) adding an iron(III) salt to a solution of carbohydrate, preferably at a constant pH of 7-13, (c) heating the aqueous solution or suspension, (d) cooling and then (e) isolating the complex (I) (2) iron complexes (I) obtained by this method (3) drugs containing (I) . EP1947120A1
