Word Origin & History. critical 1580s, censorious, from critic + -al (1). Meaning pertaining to criticism is from 1741; medical sense is from c.1600; meaning of the nature of a crisis is from 1640s; that of crucial is from 1841.
Calcium citrate is the calcium salt of citric acid. It is commonly used as a food additive (E333), usually as a preservative, but sometimes for flavor.In this sense, it is similar to sodium citrate.alcium citrate is also found in some dietary calcium supplements (e.g. Citracal).
1 Calcium citrate: Easily absorbed and digested by the body. 2  It does not contain as much elemental calcium -- the amount your body actually absorbs -- as calcium carbonate. 3  It is more expensive than calcium carbonate.4  Also, calcium citrate should not be used with aluminum-containing antacids. Calcium citrate: Easily absorbed and digested by the body. 2  It does not contain as much elemental calcium -- the amount your body actually absorbs -- as calcium carbonate. 3  It is more expensive than calcium carbonate.