1. Department of Food ChemistryInstitute of Nutritional ScienceUniversity of PotsdamArthur‐Scheunert‐Allee 114‐116 Nuthetal 14558 Germany
2. TraceAge – DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly (FOR 2558) Berlin‐Potsdam‐Jena Germany
3. Department of Molecular Nutritional PhysiologyInstitute of Nutritional SciencesFriedrich‐Schiller University JenaDornburger Straße 24 Jena 07743 Germany
4. German Institute of Human NutritionArthur‐Scheunert‐Allee 114‐116 Nuthetal 14558 Germany
5. German Federal Institute for Risk Assessment (BfR)Max‐Dohrn‐Strasse 8–10 Berlin 10589 Germany