Balance of magnesium positively correlates with that of calcium

Nishimuta M1, Kodama N, Morikuni E, Yoshioka YH, Yamada H, Kitajima H, Takeyama H, Suzuki K
J Am Coll Nutr. 2004 Dec;23(6):768S-70S

https://www.ncbi.nlm.nih.gov/pubmed/15637232