the SEM data show that the protein-protein cross-linking bonds are the starting sites of calcification. In addition, substitution of Ca2+ cations by Mg2+ cations leads to the formation of amorphous hydroxyapatite, preventing aortic valve stenosis, which suggests that treatment with magnesium salts may reduce stenosis of aortic valves…
iv.iiarjournals.org/content/28/1/91.full

We observed strong, favorable associations between higher self-reported total (dietary and supplemental) magnesium intake and lower calcification of the coronary arteries…
www.ncbi.nlm.nih.gov/pmc/articles/PMC3957229/

Studies showed that a calcium to magnesium intake ratio <2.8 is critical for optimal health, supporting a long-held but non–evidence-based recommendation that the calcium to magnesium ratio should be close to 2. Increasing calcium intakes in the United States since 1977 have resulted in a calcium to magnesium ratio >3.0 since 2000, coinciding with increasing rates of T2D and colorectal cancer. US studies assessing oral magnesium therapy or dietary magnesium intakes showed beneficial effects of dietary magnesium in CVD, T2D, and cancers, although similar studies in populations with lower calcium to magnesium ratios (≥1.7) reported the opposite…
www.ncbi.nlm.nih.gov/pmc/articles/PMC4717874/