Calcium carbonate is a common substance on Earth, found in minerals like aragonite, calcite, chalk, and travertine, as well as being a major constituent of certain animal bones and shells.

Calcium carbonate is the active ingredient in agricultural lime and is produced when calcium ions in hard water react with carbonate ions to form limescale.

Precipitated calcium carbonate (PCC) is an innovative product derived from lime, which has many industrial applications. PCC is made by hydrating high-calcium quicklime and then reacting the resulting slurry, or “milk-of-lime”, with carbo

A：Calcium carbonate is generally safe for daily calcium supplementation.