Calcium carbonate is usually the main cause of hard water.

Calcium carbonate works best if you take it with food.

And there's a fair amount of calcium carbonate as well.

Talk to your doctor before taking calcium carbonate if you are pregnant.

This list is not complete and other drugs may interact with calcium carbonate.

Your doctor or pharmacist can provide more information about calcium carbonate.

In some species the support is on a spiral made of calcium carbonate (see p. 120).

Calcium carbonate can also be used in water treatment.

You've got calcium carbonate and you pour an acid on it.

Talk to your doctor before taking calcium carbonate if you are breast-feeding a baby.