Over 23,000 Swedish men between the ages of 45 and 79 were evaluated regarding the association of dietary calcium and magnesium intake with death from all causes, heart disease and cancer among men who didn’t take mineral supplements.
The men were monitored from 1998 through December 2007, 2,358 deaths from all causes were recorded in the Swedish population registry; through December 2006, 819 CVD and 738 cancer deaths were recorded in the Swedish cause-of-death registry.
Dietary calcium was associated with a statistically significant lower rate of all-cause mortality and a lower rate of but not cancer mortality, when the highest intake level average 1,953 mg/day was compared with the lowest 990 mg/day.
Dietary magnesium intake from 387 mg/day to 523 mg/day was not associated with all-cause, CVD, or cancer mortality.
The study revealed that the men with relatively high intakes of dietary calcium and magnesium showed that intake of calcium above that recommended daily experienced a reduction in all cause of death.
Source: http://www.ncbi.nlm.nih.gov/pubmed/20172919?dopt=Abstract