Calcium is a chemical element represented by the symbol Ca and atomic number 20. It is an essential mineral in the body, playing a critical role in various physiological processes. As one of the most abundant elements in nature, calcium is particularly vital for maintaining strong bones and teeth, where about 99% of the body's calcium is stored. Beyond its structural function, calcium is crucial in muscle contraction, blood clotting, and nerve transmission, making it a key player in overall health.
Dietary sources of calcium include dairy products such as milk, yogurt, and cheese, as well as leafy green vegetables, nuts, seeds, and fortified foods. The recommended daily intake of calcium varies by age and sex, but generally, adults should aim for approximately 1,000 mg per day. For those who may struggle to meet their needs through diet alone, calcium supplements are available but should be taken with caution. It's essential to consult with a healthcare provider before starting any supplement regimen to avoid potential side effects or interactions with medications.