Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its …

Calcium is an essential nutrient found in many foods, such as dairy products, canned sardines and salmon (with bones), and leafy greens. The bones and teeth contain over 99% of all …

Jan 13, 2025 · Calcium is an essential mineral that’s key to your bones and overall health. It’s recommended that most adults consume at least 1,000 mg of calcium a day.

Calcium overview for health professionals. Research health effects, dosing, sources, deficiency symptoms, side effects, and interactions here.

Oct 2, 2025 · People need calcium for bone health and other functions. Find out why people need calcium, which foods provide it, and what happens if they consume too little.

About 99% of the body’s calcium is stored in bones, and the remaining 1% is found in blood, muscle, and other tissues. In order to perform these vital daily functions, the body works to …

May 14, 2024 · Your body needs calcium for many reasons. Learn what foods are high in calcium and how much calcium you need in a healthy diet.

Nov 1, 2022 · Calcium is important for bone health. See how much you need and how to get it. Calcium is important for bone health throughout your life. Although diet is the best way to get …

Dec 15, 2025 · Calcium benefits the body by supporting healthy bone density, improving blood pressure, and more. Learn more about calcium food sources and supplements.

A Guide to Calcium-Rich Foods We all know that milk is a great source of calcium, but you may be surprised by all the different foods you can work into your diet to reach your daily …