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 To elaborate, a 500 mg calcium citrate supplement only provides 105 mg of elemental calcium. 2  Pill size: Calcium citrate is usually small and in capsule form. 3  If you suffer from acid stomach, it is best to avoid calcium citrate.  Brands: Tums, Caltrate, and most other brands.