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About product and suppliers:
        Alibaba.com offers 500 limestone feed grade products. About 39% of these are carbonate, 3% are feed grade amino acids, and 2% are feed grade proteins. 

A wide variety of limestone feed grade options are available to you, such as polished, honed. You can also choose from > 2.56, 2.16 - 2.56. As well as from free samples. 

There are 423 limestone feed grade suppliers, mainly located in Asia. The top supplying countries are Vietnam, China (Mainland), and India, which supply 67%, 24%, and 2% of limestone feed grade respectively. 

Limestone feed grade products are most popular in Southeast Asia, South Asia, and South America. 

You can ensure product safety by selecting from certified suppliers, including 146 with Other, 51 with ISO9001, and 2 with GMP certification.