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History and Uses: Although calcium is the fifth most abundant element in the earth's crust, it is never found free in nature since it easily forms compounds by reacting with oxygen and water. Metallic calcium was first isolated by Sir Humphry Davy in 1808 through the electrolysis of a mixture of lime (CaO) and mercuric oxide (HgO).
Overlooking the Obvious!The key conclusion-that calcium supplements cause increased heart attack risk is all based on research of calcium supplements made from ROCKS. All three studies involved pills made from calcium carbonate and calcium citrate. Calcium carbonate is milled limestone or marble.Calcium citrate is simply calcium carbonate reacted with citric acid...also rock. 95% of the calcium supplements on the market, and all of the calcium supplements in the studies are made from indigestible, inert, hard, cold, and solid rock.Whether you are a creationist or an evolutionist, you would have to agree that we are not designed or evolved to metabolize rock.alcium citrate is simply calcium carbonate reacted with citric acid...also rock. 95% of the calcium supplements on the market, and all of the calcium supplements in the studies are made from indigestible, inert, hard, cold, and solid rock.