Nearly all of the calcium carried in the human body sits locked inside the mineral substance of the skeleton, rather than floating free in the bloodstream. Only a small share moves in and out of that reserve at any given moment — and it's exactly this back-and-forth between what's stored and what's on hand that turns the skeleton into something more than a fixed frame.
There's a wording for exactly this relationship, authorized by the European Commission and quoted here in full: “Calcium is needed for the maintenance of normal bones” — EU-authorized wording · Regulation (EU) No 432/2012.
Goethitelle gathers the science behind that wording: how calcium becomes locked into the solid structure of bone, why that structure keeps changing over a lifetime, and what the wording itself actually states.
Most of the body's calcium sits locked inside the skeleton, in a densely packed mineral phase that gives bone its firmness.
Before the final crystal lattice forms, the mineral apparently passes through a looser, less-ordered stage that only settles into place over time.
Bone tissue is continually broken down and rebuilt in small sections, so fresh calcium keeps getting needed for the deposit that follows.
Regularly including dairy products, almonds, certain leafy vegetables, or calcium-rich mineral water in a diet already covers a good share of the 800 mg daily reference intake through ordinary meals.
EU-authorized wording · Regulation (EU) No 432/2012
Covers the build of bone mineral, the skeleton's ongoing turnover, and the authorized statement on calcium, together with a source table.
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