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Calcium: What You Need To Know

Calcium, a vital mineral, is indispensable for numerous bodily functions. Its primary role involves strengthening bones and teeth, giving them resilience and form.


Calcium, a vital mineral, is indispensable for numerous bodily functions. Its primary role involves strengthening bones and teeth, giving them resilience and form. Additionally, calcium plays a pivotal role in muscle contractions, nerve signaling, and the clotting of blood. It facilitates the contraction and relaxation of muscles, allowing for routine movements and the proper functioning of the heart. Furthermore, calcium is integral to the prevention of excessive bleeding by promoting blood clot formation in cases of injury. In this article, we will study the importance of calcium, its dietary sources, recommended intake, and   risks.

Importance Of Calcium

Bone Health

Calcium's primary role lies in providing structural support to bones and teeth. Roughly 99% of the body's calcium resides in these skeletal structures, contributing significantly to bone density. Sufficient calcium intake during childhood and adolescence is critical for establishing sturdy bones

Muscle Function

Calcium's significance extends to muscle contractions and relaxation. When a nerve signal prompts a muscle to contract, calcium ions are released, allowing muscle fibers to constrict. Conversely, when the signal diminishes, calcium is expelled from the muscle, inducing relaxation. This mechanism underpins everyday movements and essential bodily functions, such as walking and breathing.

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Blood Clotting

Calcium plays a pivotal role in the blood coagulation process. It facilitates the transformation of fibrinogen into fibrin, a protein that assembles into a net-like structure, halting excessive bleeding following injuries. Insufficient calcium levels can impede this clotting process, resulting in prolonged bleeding.

Nerve Transmission

Calcium ions also serve a pivotal function in transmitting nerve signals. They aid in controlling the release of neurotransmitters, ensuring efficient communication among nerve cells. This proper nerve function is indispensable for tasks such as coordinating muscles, experiencing sensations, and carrying out cognitive processes.

Sources Of Calcium

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Calcium: What You Need To Know 3
  • Dairy products:  Milk , Yogurt, Cheese, Butter, Cream
  • Green Leaf: Spinach, Kale, Broccoli, Collard Greens, Bok Choy
  • Nuts: Almonds, Raisins, Cashews ,Pistachios, Dates, Walnuts
  • Seeds: Chia seed, Sesame seed, Flaxseed,Sunflower seed, Hemp seed
  • Fish with Edible Bones: Sardines, Canned salmon, Smelt, Whitebait

Calcium Intake For Various Age Groups


  • 0–6 months: 200 mg
  • 7–12 months: 260 mg


  • 1-3 years: 700 mg
  • 4–8 years: 1,000 mg

Adolescents and Adults

  • 9–18 years: 1,300 mg
  • 19–50 years: 1,000 mg

Men and Women (51-70 years)

  • Men: 1,000 mg
  • Women: 1,200 mg

Pregnant and Lactating Women

  • Pregnant teens (14–18 years): 1,300 mg
  • Pregnant adults (19+ years): 1,000 mg
  • Lactating teens (14–18 years): 1,300 mg
  • Lactating adults (19+ years): 1,000–1,300 mg

Health Issues Due To Calcium Deficiency

Deficiency in calcium, medically termed hypocalcemia, can give rise to a spectrum of health complications since calcium is a vital mineral engaged in numerous bodily functions. Here are several health issues linked to calcium deficiency:

Weakening of Bones

Inadequate calcium intake can result in fragile bones, rendering them susceptible to fractures and osteoporosis, a condition characterized by diminished bone density.

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Muscular Challenges

Calcium deficiency can trigger muscle cramps and weakness. It may also contribute to disorders like tetany, marked by involuntary muscle contractions.

Nervous System Disorders

Calcium plays a pivotal role in transmitting nerve signals. A deficiency can lead to heightened nerve sensitivity, giving rise to symptoms like tingling sensations, numbness, and even seizures.

Cardiovascular Complications

Insufficient calcium levels can affect the contraction and relaxation of heart muscles, potentially causing irregular heartbeats and hypertension.

Blood Clotting Impairment

Calcium is indispensable for the process of blood clotting. A deficiency can elevate the risk of bleeding disorders and prolonged bleeding following injuries.

Dental Problem

Calcium deficiency can also impact oral health, leading to weakened tooth enamel, dental caries, and gum ailments.


In conclusion, calcium is a mineral that plays a role in maintaining optimal health. It is well-known for bone strength, muscle function, nerve transmission, blood clotting, and dental well-being. A balanced comprising calcium-rich , including dairy products, leafy greens, nuts, seeds, and fish with edible bones, helps  in meeting recommended daily intake levels. However, an imbalance can result in a range of health complications, from weakened bones and muscle problems to cardiovascular issues and cognitive impairment. Therefore, the right balance of calcium intake is vital for overall well-being and vitality.

Frequently Asked Questions

Can I get enough calcium on a dairy-free or vegan diet?

Yes, it's possible to obtain sufficient calcium from non-dairy sources like fortified plant-based milks, leafy greens, nuts, and seeds. Vegan calcium supplements are also available.

How can I maximize calcium absorption in my body?

To enhance calcium absorption, ensure an adequate intake of vitamin D, maintain a balanced diet, and be mindful of factors that can hinder absorption, like excessive caffeine or fiber intake.

What are the symptoms of calcium deficiency?

Symptoms of calcium deficiency may include muscle cramps, numbness and tingling, weakened bones, and dental problems. A blood test can confirm calcium levels.

Can calcium-rich foods help prevent osteoporosis?

Yes, consuming an adequate amount of calcium throughout life, along with other bone-healthy habits like regular exercise and adequate vitamin D intake, can help reduce the risk of osteoporosis.

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I'm Khushi Singhal, a student from Sri Aurobindo College. I like writing about fitness and health. I studied Commerce and Economics, which helps me see things differently. When I'm not studying, I enjoy making content about staying healthy. My goal is to help people feel better through my writing, using what I've learned in school and my love for wellness.