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Higher within normal appears safe and may provide margin against future decline
The two major forms are vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol)
doi: 10.1038/ng2070 114 KempkesB.RobertsonE
[DOI] [PubMed] [Google Scholar] 162.Radeljak S., Seiwerth S., Sikiric P
