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2. Hard water - Wikipedia

   en.wikipedia.org/wiki/Hard_water

   Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [1] which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates. Drinking hard water may have moderate health benefits.

3. 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. It is the fifth most abundant element in Earth's crust, and ...

4. Mineral (nutrient) - Wikipedia

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

   In the context of nutrition, a mineral is a chemical element. Some "minerals" are essential for life, but most are not. [1][2][3] Minerals are one of the four groups of essential nutrients; the others are vitamins, essential fatty acids, and essential amino acids. [4] The five major minerals in the human body are calcium, phosphorus, potassium ...

5. What Nutritionists Want You to Know About Foods High in Magnesium

   www.aol.com/nutritionists-want-know-foods-high...

   How much magnesium do I need in a day? If you’re curious as to how much magnesium you should have in a day, just know that the Recommended Dietary Allowance (RDA) for adults ranges between 310 ...

6. Parathyroid hormone - Wikipedia

   en.wikipedia.org/wiki/Parathyroid_hormone

   PubMed search. [3] [4] Wikidata. View/Edit Human. View/Edit Mouse. Parathyroid hormone (PTH), also called parathormone or parathyrin, is a peptide hormone secreted by the parathyroid glands that regulates the serum calcium concentration through its effects on bone, kidney, and intestine. [5] PTH influences bone remodeling, which is an ongoing ...

7. Calcium metabolism - Wikipedia

   en.wikipedia.org/wiki/Calcium_metabolism

   Calcium metabolism is the movement and regulation of calcium ions (Ca 2+) in (via the gut) and out (via the gut and kidneys) of the body, and between body compartments: the blood plasma, the extracellular and intracellular fluids, and bone. Bone acts as a calcium storage center for deposits and withdrawals as needed by the blood via continual ...