- On a reef, the stony corals excrete calcium carbonate. The reef is essentially composed of the shed skeletons of these corals.
- Harvesting from a live coral reef to supply coral calcium would disturb the oceanic ecosystem. Many companies obtain coral calcium from the limestone formed by a coral reef above the surface.
- Coral calcium, while primarily made up of calcium carbonate, also contains magnesium and other trace minerals.
- Calcium obtained through nature food sources is usually best, but supplements such as those containing calcium carbonate could help increase your daily intake.
- Usually the body absorbs only 30 to 35 percent of the coral calcium taken. People who are allergic to shellfish should take caution when taking this type of calcium supplement.
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