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        Alibaba.com offers 200,603 calcium products. About 7% of these are carbonate, 3% are food additives, and 2% are plastic masterbatches. 

A wide variety of calcium options are available to you, such as herbal supplements, vitamins, and sports supplements. You can also choose from industrial grade, medicine grade, and agriculture grade. As well as from carbonate, calcium organic salt, and nitrogen fertilizer. And whether calcium is improved bone density, providing energy, or beauty products. 

There are 194,596 calcium suppliers, mainly located in Asia. The top supplying countries or regions are China, Vietnam, and India, which supply 91%, 4%, and 1% of calcium respectively. 

Calcium products are most popular in Southeast Asia, South America, and Africa. 

You can ensure product safety by selecting from certified suppliers, including 58,536 with ISO9001, 20,596 with Other, and 13,100 with ISO14001 certification.