Calcium is a vital mineral that our body needs to build strong bones and assists in other important bodily functions, such as muscle contraction, nerve transmission, and blood clotting. In fact, calcium is the most abundant mineral in the human body.

As such, it’s not surprising that many people take calcium supplements to ensure they’re getting the recommended daily dose of calcium. However, recent research shows that excessive calcium intake from supplements may be associated with a higher risk of heart attacks.

The Study

The study published in the Journal of the American Heart Association analyzed the data from 2,742 participants in a multi-ethnic cohort study.

The study aimed to evaluate whether the use of calcium supplements was associated with an increased risk of heart attacks.

The participants had an average age of 51 years with 51% of them being female. The researchers collected data on the participants’ dietary calcium intake, calcium supplement use, and the incidence of heart attacks over the course of a decade.

The Results

The results showed that participants who took calcium supplements had a 22% higher risk of having a heart attack compared to those who did not take calcium supplements.

The risk was even higher (27%) among participants who consumed more than 1,000 mg/day of calcium solely from supplements.

The researchers also found that participants who consumed more than 1,400 mg/day of calcium from supplements and dietary sources had a higher risk of heart attacks compared to those who consumed less than 600 mg/day.

Why Do Calcium Supplements Increase the Risk of Heart Attacks?

The exact mechanism behind the increased risk of heart attacks associated with calcium supplements is still unclear. However, there are a few possible explanations.

First, calcium supplements may increase the level of calcium in the blood, a condition known as hypercalcemia. This condition can lead to the formation of calcium deposits in the arteries and increase the risk of heart attacks.

Second, calcium supplements may interfere with the body’s ability to absorb other essential minerals, such as magnesium and potassium, which are crucial for heart health.

Low levels of magnesium and potassium have been linked to a higher risk of heart disease.

What Should You Do?

Although the research shows a correlation between calcium supplements and a higher risk of heart attacks, it’s important to remember that correlation does not equal causation.

Therefore, more research is needed to establish a causative relationship between calcium supplements and heart attacks.

If you’re concerned about your calcium intake, talk to your doctor. They can assess your risk factors for heart disease and determine the best course of action for you.

In the meantime, try to get your calcium from dietary sources rather than supplements. Good sources of calcium include dairy products, leafy green vegetables, nuts, and fish with bones.

If you’re unable to meet your calcium requirements through diet alone, your doctor may recommend a lower dose calcium supplement or a combination of calcium and vitamin D supplements.

Conclusion

Calcium is an essential nutrient that our body needs for various functions. While calcium supplements may seem like a convenient way to meet your daily calcium needs, excessive use of supplements may be associated with a higher risk of heart attacks.

Therefore, it’s best to get your calcium from dietary sources or speak with your doctor before taking calcium supplements.