I read on a vitamin-D product (2000NE) that I should not use calcium and magnesium with it, because it can result crystal formation in the blood. I googled, but find anything about this. Is it true?
(Somehow I doubt it, but I don't know the exact mechanism how vitamin-D works by building bones. Afaik. there are osteoblasts and osteoclasts which constantly build and degrade the Ca-Mg-PO4 depos, and I assume vitamin-D is just a cofactor of an enzyme or it is required to produce a hormone. I never heard of Ca/Mg - vitamin-D cross-reactions...)