Calcium
From Wikiwel
You’ve been hearing about calcium and bone health forever -- but did you know that magnesium and calcium are like conjoined twins? Calcium can’t even be absorbed unless magnesium is present. Without it, calcium is much less effective in maintaining your bones and regulating your nerve and muscle tone.In fact, new research shows that Americans need far more magnesium than the current RDI -- and that you should really be consuming twice as much magnesium as calcium for optimal health.