Can calcium supplements cause blockage in arteries? Here's what experts say

Recent research suggests that high doses of calcium supplements could increase the risk of heart problems. Cardiologists recommend getting calcium from food rather than supplements for better health outcomes. While calcium is essential for bones and heart health, it is best obtained through dietary sources. Calcium enters the muscle cells in your heart during every heartbeat. This helps control your heart rhythm.

Some studies have connected calcium supplements with heart issues such as heart attacks and blood vessel damage. A 2016 study by the Journal of the American Heart Association involving over 5,000 adults found that those who got the most calcium from food had a lower risk of heart problems. However, those taking supplements showed more signs of heart damage. Further studies, including one in 2020, noted increased calcification in people using supplements. Calcification is linked to hardened arteries or "hardening of the arteries".

While the consensus on the exact risks is not unanimous, more researchers are finding potential harm. A 2020 review of 42 studies and a 2021 review of 15 studies suggest that calcium supplements might indeed harm the heart. When supplements are taken, calcium levels in the blood rise, potentially damaging artery linings and leading to calcification. It’s possible that supplements may raise your risk for heart problems.

Men and women both need calcium for bone health, but women are more likely to take supplements, potentially leading to a higher risk. People with chronic kidney disease or a history of kidney stones should be particularly cautious. Speaking with a healthcare professional before starting any supplement is advised, as they can help assess the necessity and potential risks.

For most, food remains the best source of calcium. Ensuring proper dietary intake might prevent heart disease without the risks associated with supplements.