1. Institute of Nutritional ScienceUniversity of Potsdam 14558 Nuthetal Germany
2. Albert Einstein College of Medicine 10461 NY USA
3. Umeå Centre for Molecular MedicineUmeå University 90187 Umeå Sweden
4. Institute of Chemistry, Analytical Chemistry, NAWI GrazUniversity of Graz 8010 Graz Austria
5. Institute of NutritionFriedrich Schiller University Jena 07743 Jena Germany
6. TraceAge – DFG Research Unit FOR 2558 Berlin‐Potsdam‐Jena Germany
7. Faculty of Mathematics and Natural SciencesUniversity of Wuppertal 42119 Wuppertal Germany