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2. Calcium metabolism - Wikipedia

   en.wikipedia.org/wiki/Calcium_metabolism

   Calcium regulation in the human body. [6]The plasma ionized calcium concentration is regulated within narrow limits (1.3–1.5 mmol/L). This is achieved by both the parafollicular cells of the thyroid gland, and the parathyroid glands constantly sensing (i.e. measuring) the concentration of calcium ions in the blood flowing through them.

3. Calcium in biology - Wikipedia

   en.wikipedia.org/wiki/Calcium_in_biology

   The most striking use of Ca 2+ ions as a structural element in algae occurs in the marine coccolithophores, which use Ca 2+ to form the calcium carbonate plates, with which they are covered. Calcium is needed to form the pectin in the middle lamella of newly formed cells. Calcium is needed to stabilize the permeability of cell membranes.

4. Mineral (nutrient) - Wikipedia

   en.wikipedia.org/wiki/Mineral_(nutrient)

   Finally, although mineral and elements are in many ways synonymous, minerals are only bioavailable to the extent that they can be absorbed. To be absorbed, minerals either must be soluble or readily extractable by the consuming organism. For example, molybdenum is an essential mineral, but metallic molybdenum has no nutritional benefit.

5. Calcium - Wikipedia

   en.wikipedia.org/wiki/Calcium

   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 physical and chemical properties are most similar to its heavier homologues strontium and barium.

6. The 7 Best Foods for Osteoporosis, According to Dietitians - AOL

   www.aol.com/lifestyle/7-best-foods-osteoporosis...

   These 7 foods are rich in bone-building protein, calcium and vitamins D and K. ... making it arguably the most important nutrient for bone health,” adds Kaytee Hadley, M.S., ...

7. Calcium supplement - Wikipedia

   en.wikipedia.org/wiki/Calcium_supplement

   The forms that are taken by mouth include calcium acetate, calcium carbonate, calcium citrate, calcium gluconate, calcium lactate, and calcium phosphate. [ 1 ] The absorption of calcium from most food and commonly used dietary supplements is very similar. [ 27 ]