Author Contributions
C.D., C.G., S.L. and G.I.S.: Acquisition of funding. F.S. and C.D. are responsible for the study design, conduction of the study, data acquisition, statistical analysis, data interpretation and for writing the manuscript; J.K. (Julia Kunze) performed the preanalysis of the blood samples and assisted in the preparation of the study; B.S. was responsible for the fatty acid analysis and evaluation; J.K. (Julia Kühn) and G.I.S.: Quantification of vitamin D and precursors; A.-L.H. and C.G.: Cultivation of 