Calcium Supplements To Keep You Living Longer

Calcium Carbonate

Calcium carbonate is a popular form of calcium found in many supplements. It is an alkaline mineral composed of up to forty percent elemental calcium, which is one of the highest sources. However, calcium carbonate is not easily absorbed into the digestive tract as it requires the production of extra stomach acid. Calcium carbonate can be found in limestone, rock, and shells of pearls, marine animals, eggshells, and snails. As one of the cheapest and most prevalent forms of calcium supplements on the market, avoid this form by checking product labels.