Excess of THIS supplement can cause heart attack

You must have come across a popular adage that conveys that excess of everything causes problems. The same stands true for important supplements as well. While we consume them without a proper certified prescription, assuming that one pill of calcium or vitamin D won't do any harm to the body, the reality is it can have a much more dangerous effect on the body later.

For example calcium, which is essential for strong bones, teeth, and the proper functioning of muscles and nerves can prove to be a threat for the heart.


Calcium is an important mineral in the human body because it plays a critical role in blood clotting and heart health. While the calcium from the diet, obtained through dairy products, leafy greens, and fortified foods, is healthy, the high intake of calcium supplements poses severe health implications, such as increasing the chances of heart attacks. This risk has emerged as a serious cause of concern in recent years, mainly because more people resorted to supplements to supplement their calcium needs and went beyond the recommended daily intake without considering side effects.

How does calcium affect the heart?

Calcium supplements are often prescribed to individuals, particularly older adults, to prevent or treat osteoporosis. However, taking more than the recommended daily allowance (RDA) can lead to calcium overload, a condition known as hypercalcemia. The RDA for calcium for most adults is 1,000–1,200 milligrams per day. When calcium levels in the blood are too high, it can cause calcification of soft tissues, including the blood vessels. This calcification is a significant contributor to cardiovascular diseases, as it makes arteries less flexible and narrows the pathways through which blood flows, increasing the risk of blockages that can lead to heart attacks.

One of the key reasons calcium supplements may contribute to heart attacks is their effect on the balance of calcium and other essential minerals in the body. Unlike dietary calcium, which is absorbed gradually and regulated naturally by the body, calcium supplements cause a sudden spike in calcium levels in the bloodstream. This abrupt increase can overwhelm the body’s ability to manage and distribute the mineral appropriately, leading to calcium deposits in arterial walls. These deposits, or plaques, harden the arteries, reducing blood flow and increasing the risk of cardiovascular complications.

Research studies have highlighted this potential link between calcium supplements and heart attack risk.

Moreover, excessive calcium intake can disrupt the delicate balance of other minerals in the body, such as magnesium and phosphorus, which are crucial for heart health. Magnesium, in particular, helps regulate the heart’s rhythm and prevents excessive calcification of tissues. When calcium levels are disproportionately high, magnesium may become deficient, further exacerbating cardiovascular risks. Similarly, a high calcium-to-phosphorus ratio can negatively impact arterial elasticity, compounding the problem.

It is also worth noting that many people who take calcium supplements may already be at an elevated risk for heart disease due to age, lifestyle factors, or pre-existing conditions. For instance, postmenopausal women, a group often targeted for calcium supplementation to prevent bone loss, are also more likely to develop cardiovascular diseases. For these individuals, excessive calcium supplementation may pose a double threat, as it not only increases their cardiovascular risk but also fails to provide the holistic benefits of dietary calcium, which includes the added advantages of other nutrients like vitamin K2 and vitamin D.

To minimize the risks associated with calcium supplements, it is crucial to follow guidelines. If supplements are necessary, they should be taken in moderate doses, ideally spread out throughout the day to mimic the gradual absorption that occurs with food. Pairing calcium supplements with the right kind of food, for example vitamin D can enhance calcium absorption and reduce the likelihood of calcification in arteries. Maintaining a balanced diet rich in magnesium, potassium, and other essential nutrients is also critical to supporting overall cardiovascular health.