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).
Quick Answer. Foods that contain calcium citrate naturally include lemons and limes, oranges and grapefruit, pineapple, hard cheeses, and certain cheese products. Considered a safe food additive, calcium citrate is used in processed foods to condition some doughs and frozen breads and as a preservative in frozen dinners, vegetables and ice cream.