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What Is Calcium Do In The Body? Understanding Its Functions And Benefits

By Adam Saviour

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This article was created after thorough research and has been improved with the assistance of AI technology. Furthermore, our dedicated editorial team has meticulously fact-checked and polished its content for accuracy and clarity.

When it comes to necessary nutrients, calcium is frequently in the spotlight. We’ve all heard about its importance for strong bones and teeth, but the truth is, this remarkable mineral does so much more than just build sturdy skeletons. From regulating muscle contractions to supporting nerve function and blood clotting, calcium is a true multitasker that plays countless vital roles in our bodies. 

In this article, we’ll delve into the fascinating world of calcium and uncover its diverse contributions to our overall health and well-being.

Key takeaways:

Approximately 99% of the body’s calcium is stored in the bones and teeth, making it crucial for attaining peak bone mass during childhood/adolescence and preventing osteoporosis later in life.
Calcium is involved in the release of neurotransmitters, which is essential for coordinating various bodily functions like movement, cognition, and sensory perception. It also supports the overall health and function of the nervous system.
Calcium influences the regulation of hormone release from endocrine glands, affecting processes like metabolism, growth, and development.

An Introduction To Calcium: The Essential Mineral

Before we dive into calcium’s many functions, let’s start with a brief introduction to this mighty mineral. Calcium is a mineral that belongs to the alkaline earth metal group, and it’s the fifth most abundant element found in the human body. Remarkably, it accounts for approximately 1.5-2% of our total body weight, highlighting its significance in our overall composition.

Calcium Do In The Body

We obtain calcium primarily through our diet, with dairy products like milk, yogurt, and cheese being excellent sources. Additionally, leafy green vegetables, certain types of fish with edible bones, and calcium-fortified foods and beverages can provide substantial amounts of this vital nutrient.

The recommended daily intake of calcium varies by age and life stage, with adults aged 19-50 generally recommended to consume 1,000 milligrams (mg) per day. However, these recommendations may differ slightly for children, adolescents, and older adults, reflecting the changing calcium needs throughout different life stages.

What Does Calcium Do?

Calcium is the most abundant mineral found in the human body, according to the National Institutes of Health (NIH). Here are the major functions of calcium in our body.

One of calcium’s most well-known functions is its crucial role in building and maintaining strong, dense bones. Approximately 99% of the body’s calcium is stored in the bones and teeth, providing the structural support and strength that our skeletal system requires.

During the critical periods of childhood and adolescence, when bones are rapidly growing and developing, adequate calcium intake is of utmost importance. Ensuring sufficient calcium during these formative years helps individuals attain peak bone mass, setting the foundation for lifelong bone health.

As we age, calcium continues to play a vital role in preventing the development of osteoporosis, a condition characterized by low bone mass and an increased risk of fractures. By maintaining adequate calcium intake, combined with weight-bearing exercise and other lifestyle factors, individuals can help preserve bone density and reduce the likelihood of osteoporotic fractures.

Calcium’s influence on our bodies extends to the intricate world of nerve function. This mineral plays a vital role in the transmission of nerve impulses throughout the body, as it is involved in the release of neurotransmitters – chemical messengers that facilitate communication between nerve cells.

Calcium regulates the release of these neurotransmitters from nerve cells, ensuring that the intricate system of communication between neurons functions smoothly. This process is essential for coordinating various bodily functions, including movement, cognition, and sensory perception.

Moreover, adequate calcium levels are crucial for maintaining the integrity and optimal functioning of the nervous system. This has important implications for cognitive function, mood regulation, and the potential prevention of certain neurological disorders, further highlighting the significance of calcium in overall health.

In addition to its roles in bone health, muscle function, and nerve transmission, calcium also plays a crucial part in the body’s ability to stop bleeding and heal wounds.

Calcium is an essential component of the coagulation cascade, a series of reactions that lead to the formation of blood clots. This process is critical for preventing excessive bleeding after an injury and facilitating the body’s natural healing mechanisms.

By facilitating blood clotting, calcium plays a vital role in the wound-healing process. Proper clot formation helps to stop bleeding and initiates the healing cascade, leading to tissue repair and regeneration, ultimately enabling the body to recover from injuries more effectively. While the relationship is complex and still being explored, some research suggests that maintaining optimal calcium levels may have potential benefits fo cardiovascular health by supporting healthy blood clotting mechanisms and vascular function.

Calcium’s influence extends even further, as it is involved in the regulation of hormone release from various endocrine glands, including the thyroid, parathyroid, and pancreas. This intricate process is essential for maintaining hormonal balance within the body.

By influencing hormonal secretion, calcium plays a role in regulating metabolic processes, growth and development, and other vital bodily functions controlled by the endocrine system. This highlights the far-reaching effects of calcium on overall health and well-being.

Emerging research indicates that calcium may have implications for metabolic health, potentially influencing processes such as insulin sensitivity, glucose metabolism, and lipid regulation. While further studies are needed, these findings suggest that calcium’s impact extends beyond its traditionally recognized roles.

Maintaining Calcium Balance

While calcium is essential for numerous bodily functions, it’s important to maintain a delicate balance of this mineral. Imbalances in calcium levels can lead to adverse health consequences.

Hypocalcemia, or low calcium levels, can result in symptoms such as muscle cramps, numbness, seizures, and, in severe cases, cardiac arrhythmias. It can also increase the risk of osteoporosis and fractures, underscoring the importance of maintaining adequate calcium levels.

On the other hand, hypercalcemia (high calcium levels) can result from certain medical conditions or excessive supplementation. It can cause symptoms such as nausea, vomiting, constipation, and kidney stones, highlighting the need for careful monitoring and regulation of calcium levels.

Certain disorders, such as hyperparathyroidism and hypoparathyroidism, can affect the body’s ability to regulate calcium levels, leading to potential health consequences. Early detection and proper management of these conditions are essential for maintaining calcium homeostasis.

Dietary Strategies For Optimal Calcium Intake

To maintain optimal calcium levels and reap the numerous benefits of this mighty mineral, it’s essential to incorporate calcium-rich foods into a balanced diet. Dairy products like milk, yogurt, and cheese are excellent sources, as are leafy greens, certain fortified foods, and fish with edible bones.

It’s important to note that certain factors can influence the absorption of calcium from the gut, such as vitamin D status, age, and the presence of specific dietary components. Ensuring optimal absorption is key to maintaining calcium balance within the body.

For individuals who struggle to meet their calcium needs through diet alone, calcium supplements or fortified foods and beverages may be recommended under medical supervision. These products can help bridge the gap and ensure adequate calcium intake.


As we’ve explored, calcium is a remarkable mineral that plays tremendous roles in the body, from building strong bones and supporting muscle function to regulating nerve transmission, blood clotting, and hormonal secretion. Its versatility and importance cannot be overstated, as it contributes to the optimal functioning of various systems within our bodies.

Maintaining adequate calcium intake throughout life is crucial for overall health and well-being. Ensuring sufficient calcium levels can help prevent various health issues and support optimal bodily functions. By incorporating calcium-rich foods into our diets and consulting with healthcare professionals when necessary, we can harness the power of this mighty mineral and support our bodies in countless ways.


1. What are the benefits of calcium?

Calcium plays a crucial role in maintaining strong bones and teeth, supporting proper muscle function, aiding in nerve transmission, assisting in blood clotting, and regulating heart rhythm.

2. What is the main role of calcium in the body?

The primary role of calcium is to provide structural support to bones and teeth. Additionally, it facilitates muscle contraction, nerve signaling, blood clotting, and enzyme function.

3. What happens to your body when you lack calcium?

Calcium deficiency can lead to weak bones and teeth, increasing the risk of fractures and osteoporosis. It may also cause muscle cramps, irregular heartbeat, numbness or tingling in extremities, and poor blood clotting.

4. What does a lot of calcium do to you?

Excessive calcium intake can lead to hypercalcemia, characterized by symptoms such as fatigue, constipation, excessive thirst, kidney stones, and impaired kidney function. It may also interfere with the absorption of other essential minerals like iron and zinc.


Adam Saviour

Dr. Adam Saviour has established himself as a leading figure in the field of neurology. Holding a Doctor of Medicine degree, he completed his rigorous residency training in neurology at a preeminent medical institution, laying the foundation for his exceptional expertise.

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