A PREPARATION IS DISCLOSED THAT COMPRISES ONE OR MORE IRON(III) COMPLEX COMPOUNDS WHICH HAVE A REDOX POTENTIAL AT PH 7 OF FROM -324 MV TO -750 MV RELATIVE TO A NORMAL HYDROGEN ELECTRODE (NHE), AND ONE OR MORE REDOX-ACTIVE SUBSTANCES, WHEREIN THE CARBOHYDRATES ARE SELECTED FROM THE GROUP CONTAINING DEXTRANS AND HYDROGENATED DEXTRANS, DEXTRINES, OXIDISED OR HYDROGENATED DEXTRINES, AS WELL AS PULLULAN, OLIGOMERS THEREOF AND/OR HYDROGENATED PULLULANS, AND WHEREIN THE REDOX-ACTIVE SUBSTANCE(S) IS/ARE SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID； VITAMIN E； CYSTEINE； PHYSIOLOGICALLY ACCEPTABLE PHENOLS/POLYPHENOLS SELECTED FROM THE GROUP CONSISTING OF QUERCETIN, RUTIN, FLAVONES, FLAVONOIDS, HYDROQUINONES； AND GLUTHATHIONE, AND IN PARTICULAR IS ASCORBIC ACID.
