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Calcium intake, both dietary and supplemental, is encouraged to improve bone health, and many older adults take calcium supplements. Recent randomized trials of supplementation suggest an association with cardiovascular disease (CVD), but the studies are heterogeneous, and results are mixed. In this prospective cohort study, U.S. researchers assessed baseline calcium intake — including dietary recall and calcium supplements and calcium-containing antacids and multivitamins — in 390,000 older adults (mean age, 61). About 50% of men and 70% of women used calcium-containing supplements. Median daily dietary intake of calcium in both men and women was 700 mg.
During 12 years of follow-up, researchers identified 12,000 CVD-related deaths. In anal…