Changes

{{infobox calcium}}

{{infobox calcium}}

[[File:Calcium unter Argon Schutzgasatmosphäre.jpg|thumb|Very pure calcium metal, not corroded]]

[[File:Calcium unter Argon Schutzgasatmosphäre.jpg|thumb|Very pure calcium metal, not corroded]]

When calcium is mixed into building materials in the right form and concentration, it makes [[Building|buildings]] stronger and more resistant to [[weather]]. Calcium is used by humans in [[construction]] (as limestone, or [[calcium carbonate]]) to make [[concrete]] and [[Brick|bricks]] better for building with, and gypsum ([[calcium sulfate]]) as a plaster.<ref>{{Cite web|url=https://pubs.usgs.gov/sir/2017/5118/elements/Calcium/Ca_txt.html|access-date=2026-04-11|website=pubs.usgs.gov}}</ref>   

When calcium is mixed into building materials in the right form and concentration, it makes [[Building|buildings]] stronger and more resistant to [[weather]]. Calcium is used by humans in [[construction]] (as limestone, or [[calcium carbonate]]) to make [[concrete]] and [[Brick|bricks]] better for building with, and gypsum ([[calcium sulfate]]) as a plaster.<ref>{{Cite web|url=https://pubs.usgs.gov/sir/2017/5118/elements/Calcium/Ca_txt.html|access-date=2026-04-11|website=pubs.usgs.gov}}</ref>   

In [[brewery]] (making [[Alcohol (drug)|alcohol]]) gypsum is used and is the good one. Gypsum (calcium sulphate) is the good mineral because it does not break down with boiling, which alcohol needs. Chalk ([[Calcium carbonate|calcium bicarbonate]]) is the bad form to use in brewery because it does break down, deposits limescale on the equipment and brings out the "harsher characteristics" of the [[hops]] as well as its ions interacting negatively with the [[fermentation]] process.<ref>{{Cite book|title=Home brewing: a guide to making your own beer, wine and cider|last=Bruning|first=Ted|date=2011|publisher=National Trust|isbn=978-1-907892-03-5|location=London}}</ref>   

In [[brewery]] (making [[Alcohol (drug)|alcohol]]) gypsum is used and is the good one. Gypsum (calcium sulphate) is the good mineral because it does not break down with boiling, which alcohol needs. Chalk ([[Calcium carbonate|calcium bicarbonate]]) is the bad form to use in brewery because it does break down, deposits limescale on the equipment and brings out the "harsher characteristics" of the [[hops]] as well as its ions interacting negatively with the [[fermentation]] process.<ref>{{Cite book|title=Home brewing: a guide to making your own beer, wine and cider|url=https://archive.org/details/homebrewingguide0000brun|last=Bruning|first=Ted|date=2011|publisher=National Trust|isbn=978-1-907892-03-5|location=London}}</ref>   

Humans (and other animals) use calcium to maintain or grow healthy bones and [[Tooth|teeth]].<ref name=":2" /> Calcium is used in the body where electricity is used, like in the muscles and nerves. Calcium is useful for animals and humans, and is found in nature. [[Cow]] milk is rich in calcium and other nutrients so that baby cows drinking it from their mother can grow up healthy and strong.

Humans (and other animals) use calcium to maintain or grow healthy bones and [[Tooth|teeth]].<ref name=":2" /> Calcium is used in the body where electricity is used, like in the muscles and nerves. Calcium is useful for animals and humans, and is found in nature. [[Cow]] milk is rich in calcium and other nutrients so that baby cows drinking it from their mother can grow up healthy and strong.

[[Calcium supplements]] exist and taking less than 1,500mg a day is probably not going to cause harm.<ref name=":2" /> Taking too much calcium in [[Dietary supplement|supplement form]] might damage the body, and a balanced, [[Healthy diet|varied diet]] is usually enough to get all of the calcium the [[body]] needs. Supplements are taken with food.<ref name=":5">{{Cite web|title=Calcium|url=https://www.drugs.com/cdi/calcium.html|url-status=live|archive-url=|website=drugs.com}}</ref>

[[Calcium supplements]] exist and taking less than 1,500mg a day is probably not going to cause harm.<ref name=":2" /> Taking too much calcium in [[Dietary supplement|supplement form]] might damage the body, and a balanced, [[Healthy diet|varied diet]] is usually enough to get all of the calcium the [[body]] needs. Supplements are taken with food.<ref name=":5">{{Cite web|title=Calcium|url=https://www.drugs.com/cdi/calcium.html|url-status=live|archive-url=|website=drugs.com}}</ref>

Some people have [[Adverse effect (medicine)|adverse reactions]] to calcium supplements, or more rarely, [[Allergic reaction|allergic reactions]]. Signs of adverse effects from calcium supplements (or [[Hypercalcemia|hypercalcaemia]]) include feeling [[Fatigue|tired]], [[Confusion|confused]], [[headache]], an upset stomach (or [[tummy ache]]), [[constipation]] and [[Vomiting|throwing up]].<ref name=":5" /> Calcium can cause bone pain in high amounts or as an allergic or adverse reaction.<ref name=":5" />.

Some people have [[Adverse effect (medicine)|adverse reactions]] to calcium supplements, or more rarely, [[Allergic reaction|allergic reactions]]. Signs of adverse effects from calcium supplements (or [[Hypercalcemia|hypercalcaemia]]) include feeling [[Fatigue|tired]], [[Confusion|confused]], [[headache]], an upset stomach (or [[tummy ache]]), [[constipation]] and [[Vomiting|throwing up]].<ref name=":5" /> Calcium can cause bone pain in high amounts or as an allergic or adverse reaction.<ref name=":5" />

== Use in the body ==

== Use in the body ==

{{See also|Calcium (diet)}}

{{See also|Calcium (diet)}}

<gallery widths='160px' heights='100%' mode='traditional' caption=''>

<gallery widths='160px' heights='100%' mode='traditional' caption=''>

File:Calcium crystals.jpg|Calcium crystals stored in mineral oil

File:Calcium crystals.jpg|Calcium crystals stored in mineral oil

File:Ein Ghazal Venus.jpg|One of the [['Ain Ghazal Statues]], made from [[lime plaster]]

File:Ein Ghazal Venus.jpg|One of the [['Ain Ghazal Statues]], made from [[lime plaster]]