I've read that calcium supplements may increase the risk of heart attack. Is this true?
Answer From Rekha Mankad, M.D.
Some doctors think it's possible that taking calcium supplements may increase your risk of a heart attack. Other doctors believe that calcium supplements have little or no effect on your heart attack risk.
Many people take calcium supplements to treat or prevent bone disease, such as osteoporosis. It's thought that the calcium in these supplements could make its way into fatty plaques in your arteries — a condition called atherosclerosis — causing those plaques to harden and increase your risk of heart disease.
A 2013 study from the National Institutes of Health suggests there is an increased risk of heart attack, stroke or other cardiovascular diseases from taking calcium supplements for men only. Other studies suggest there is an increased risk for both men and women.
More research is needed before doctors know the effect calcium supplements may have on your heart attack risk. The calcium supplements that some doctors are concerned about are generally those that contain only calcium. However, more research is also needed to determine the effects of supplements combining calcium and vitamin D. Calcium from food sources, such as dairy and green leafy vegetables, is not a concern.
Current recommendations for getting enough calcium for people who have, or have risk factors for, osteoporosis haven't changed. As with any health issue, it's important to talk to your doctor to determine what's most appropriate in your case.
Feb. 11, 2016
- Paik JM, et al. Calcium supplement intake and risk of cardiovascular disease in women. Osteoporosis International. 2014;25:2047.
- Waldman T, et al. Calcium supplements and cardiovascular disease: A review. American Journal of Lifestyle Medicine. 2015;9:298.
- Reid IR. Cardiovascular effects of calcium supplements. Nutrients. 2013;5:2522.
- Xiao Q, et al. Dietary and supplemental calcium intake and cardiovascular disease mortality: The National Institutes of Health-AARP diet and health study. JAMA Internal Medicine. 2013;173:639.
- Bolland MJ, et al. Calcium supplements with or without vitamin D and risk of cardiovascular events: Reanalysis of the Women's Health Initiative limited access dataset and meta-analysis. BMJ. 2011;342:d2040.
- Bolland MJ, et al. Calcium supplements and cardiovascular risk: 5 years on. Thereapeutic Advances in Drug Safety. 2013;4:199.