Another “Vitamin D” MythBuster - The always tested ”D”arling (25(OH)D, storage D) depends on a functional 25-Hydroxy enzyme found in the Liver ...but Hint hint, this special enzyme is only able to do its job properly when a sufficient amount of tissue Magnesium (RBC Mg) is available!
Learn more: “Magnesium, vitamin D status and mortality: results from US National Health and Nutrition Examination Survey (NHANES) 2001 to 2006 and NHANES III
https://bmcmedicine.biomedcentral.com/articles/10.1186/1741-7015-11-187