Useful info on magnesium:
High-Dose Vitamin D Depletes Magnesium – Carolyn DEAN, MD ND.
https://mirzoune-ciboulette.forumactif.org/t2130-dynamique-entre-vitamine-d-magnesium-et-calcium#30339
Excerpt 1:
Magnesium expert Andrea Rosanoff, Ph.D., is one of the few people who understands the dynamic between vitamin D, magnesium, and calcium. She makes it the subject of her 2016 article, “Essential Nutrient Interactions: Does Low or Suboptimal Magnesium Status Interact with Vitamin D and/or Calcium Status?”
Excerpt 2:
Magnesium is required for many steps in vitamin D metabolism, including its conversion from its storage form (which is also the supplement form) to its active form. This means that taking extremely high doses of vitamin D can lead to magnesium deficiency without anyone realizing it.