This article was medically reviewed by MD, Specialist Level 1 Vo Khac Khoi Nguyen – Department of General Surgery, Vinmec Central Park International Hospital.
Adequate calcium intake is essential for maintaining healthy bone mineral density in the elderly. Calcium deficiency is a risk factor for osteoporosis and fractures. Calcium supplementation is often recommended for people with inadequate calcium intake or with osteoporosis to prevent deterioration in bone strength. However, a significant percentage of people worldwide are not getting the calcium they need. So we need to understand the problem of calcium supplementation properly.
1. The Role of Calcium in the Body and the Musculoskeletal System
Calcium is the most abundant mineral in the human body, with 98–99% stored in bones and teeth. The remaining 1%, found in blood and cells, is essential for many physiological functions. This explains why measuring blood calcium levels does not necessarily reflect the body’s overall calcium status or need for supplementation.
Calcium forms a fundamental part of bone structure, helping bones grow and strengthen, especially during puberty. It is also critical for normal muscle contraction. Without sufficient calcium, muscles cannot contract properly. Therefore, calcium is indispensable for maintaining the function of the musculoskeletal system, supporting normal heart rhythm, aiding blood clotting, and participating in various metabolic processes.
When the body excretes too much calcium through the kidneys—especially in people who are inactive or drink little water—the risk of kidney or bladder stones increases.
2. Symptoms of Calcium Deficiency
Calcium deficiency occurs when the body does not receive enough calcium. Initially, symptoms may be subtle, but over time, they can become more serious. Common signs include:
- Memory loss or confusion
- Muscle stiffness or cramps
- Tingling or numbness in the hands, feet, or face
- Depression
- Hallucinations
- Cramping
- Brittle nails
- Weak bones
Other signs include slow hair growth and thinning skin. These symptoms highlight that calcium is essential not only for bones and teeth but also for healthy nerves, muscles, and skin.
3. Diseases and Complications Caused by Calcium Deficiency
3.1 Osteoporosis
Osteoporosis caused by calcium deficiency is a silent disease that weakens bones over time, making them fragile and prone to fractures. About 60% of vertebral compression fractures due to osteoporosis occur without obvious symptoms. When symptoms do appear, patients may experience back pain, loss of height, spinal curvature (kyphosis), and fractures even after minor injuries.
Statistics show that osteoporosis is particularly common among women - 1 in 3 women over 50 will develop the disease, compared to 1 in 10 men.
3.2 Other Complications
Severe calcium deficiency can lead to vision problems, cardiac arrhythmias, and increased fracture risk. These complications can significantly impair quality of life and, in extreme cases, be life-threatening, they include:
- Disability due to osteoporosis
- Fracture of the spine or other bones
- Reduced mobility
Severe calcium deficiency can be life threatening. These complications highlight the importance of maintaining adequate calcium concentration in the body to avoid serious health problems.
4. Causes of Calcium Deficiency
There are two main causes of calcium deficiency. The first is nutritional deficiency – when the diet lacks sufficient calcium or vitamin D, which is required for calcium absorption. The second is metabolic and endocrine disorders, aging, or sedentary lifestyle, which can impair calcium metabolism even when intake is adequate.
4.1 Calcium Deficiency Due to Inadequate Diet
In the United States, the recommended daily calcium intake is 1,200 mg for adults and 1,500 mg for the elderly(measured as elemental calcium). However, national surveys indicate that over 80% of older adults and 43% of the general population fail to meet this target. About 70% of elderly American women are already supplementing calcium. In East Asia and parts of Central America, calcium consumption averages only a fifth to a third of that in Europe and North America.
4.2 Calcium Deficiency Due to Malabsorption or Lifestyle Factors
Calcium supplementation plays a key role in managing osteoporosis and is particularly important for postmenopausal women and older adults in countries where diets are calcium-poor, such as Vietnam.
Dietary sources rich in calcium include:
- Seafood: shrimp, crab, shellfish, and fish
- Dark green vegetables: lettuce, cabbage, kale, and celery - also rich in vitamin K, which enhances calcium absorption and bone mineralization, and can prevent osteoporosis
- Dairy products: milk, yogurt, and cheese - excellent sources of easily absorbed calcium
Milk consumption in Vietnam remains low, with most people meeting only half their daily calcium requirement.
Recent studies show that the benefits of calcium supplementation vary across regions, depending on baseline dietary intake. People in low-calcium regions gain more from supplementation. This is especially important in Asia, where hip fracture rates are rapidly rising due to population aging - by 2050, over half of all hip fractures worldwide are projected to occur in Asia.
Maintaining a calcium-rich diet is therefore essential for bone health. When diet alone is insufficient, daily calcium supplements should be considered. Calcium deficiency contributes not only to osteoporosis but also to general decline in health and vitality.
Vinmec International General Hospital has successfully implemented PRP (Platelet-Rich Plasma) therapy for musculoskeletal diseases, achieving safe, effective results with minimal recurrence. Vinmec is a leading medical center in the treatment of conditions such as osteoporosis, arthritis, degenerative joint disease, herniated discs, and chronic joint pain, using modern medical technologies to deliver optimal outcomes for patients.
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