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).
Calcium Citrate is a chelated mineral. It is basically calcium wrapped with a covering derived from citric acid. Calcium citrate is 21% calcium. Because of the chelation it is better absorbed than calcium carbonate. Calcium citrate is a high-quality calcium source for food fortification.