Calcium deficiency
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Global Prevalence of Calcium Deficiency
Calcium deficiency is a widespread issue, affecting about half of the world’s population. The problem is especially severe in low- and middle-income countries, but even people in high-income countries often do not meet recommended calcium intake levels. In 2011, an estimated 3.5 billion people were at risk of calcium deficiency due to inadequate dietary supply, with the majority of those affected living in Africa and Asia. Although the global risk of calcium deficiency has decreased over the past decades, it remains a significant public health concern worldwide 16.
Health Consequences of Calcium Deficiency
Bone Health and Osteoporosis
Calcium is essential for bone health. Deficiency leads to reduced bone mass and strength, increasing the risk of osteoporosis and fractures. This has been demonstrated in both animal and human studies, where calcium deficiency causes bone atrophy and increased bone resorption. In postmenopausal women, negative calcium balance is a key factor in the development of osteoporosis, although other factors like vitamin D deficiency and hormonal changes also play a role 1457+1 MORE.
Other Health Outcomes
Inadequate calcium intake is linked to a range of health problems beyond bone health. These include pregnancy complications (such as preeclampsia and preterm birth), certain cancers, cardiovascular disease, dental changes, cataracts, and alterations in brain function. Women, especially during pregnancy and lactation, are at higher risk due to increased calcium needs 127.
Regional Insights: Bangladesh and India
In Bangladesh, calcium intake is low across the population, with young children and women of childbearing age being most affected. This deficiency contributes to persistent public health issues, including stunting and increased risk of pregnancy complications. Supplementation programs for pregnant women are considered promising for reducing related health risks .
In India, despite being a major producer of milk and cereals, dietary calcium intake has declined over the past 50 years. Most calcium comes from non-dairy sources, and both rural and urban populations are affected. The decline in cereal consumption and low intake of dairy products contribute to the problem. Vitamin D deficiency is also widespread, compounding the effects of calcium deficiency. Addressing this issue requires multi-pronged strategies, including supplementation, food fortification, and educational initiatives .
Strategies to Combat Calcium Deficiency
Dietary Diversification and Fortification
Improving dietary intake of calcium is the most cost-effective way to address deficiency. Strategies include dietary diversification, food fortification, crop breeding (biofortification), and the use of micronutrient fertilizers. Finger millet, a crop with high calcium content, is being explored as a potential solution, especially in regions where calcium malnutrition is common 610.
Supplementation Programs
Targeted supplementation, especially for high-risk groups like pregnant women and children, can help reduce the risk of complications related to calcium deficiency. National programs and public health interventions are needed to ensure adequate calcium intake in vulnerable populations 23.
Calcium Deficiency in Plants
Calcium deficiency also affects plants, leading to symptoms such as water-soaked tissues, cell breakdown, and necrosis. This can impact food quality and availability, further influencing human calcium intake .
Conclusion
Calcium deficiency remains a major global health issue, particularly in low- and middle-income countries and among vulnerable groups such as women, children, and the elderly. It leads to serious health consequences, especially related to bone health, but also affects other body systems. Addressing this problem requires a combination of dietary improvements, supplementation, food fortification, and agricultural interventions to ensure adequate calcium intake for all populations 1236+2 MORE.
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