Magnesium may play important role in optimizing vitamin D levels, study shows, News Medical Life Science Dec. 14.2018

“Magnesium deficiency shuts down the vitamin D synthesis and metabolism pathway," Dai said...”
https://www.news-medical.net/news/20181214/Magnesium-may-play-important-role-in-optimizing-vitamin-D-levels-study-shows.aspx?fbclid=IwAR3H5-HxZ9TQrGszdJ0KGAtJIS8-1zPviS9LuKo4gPfkBFngRDmOYNG5Exw

A randomized trial by Vanderbilt-Ingram Cancer Center researchers indicates that magnesium optimizes vitamin D status, raising it in people with deficient levels and lowering it in people with high levels.