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About product and suppliers:
        Alibaba.com offers 2,113 b12 pharmaceutical grade products. About 74% of these are vitamins, amino acids and coenzymes, 7% are antibiotic and antimicrobial agents, and 7% are anti-allergic agents. 

A wide variety of b12 pharmaceutical grade options are available to you, such as food grade, cosmetic grade, and feed grade. You can also choose from free samples, paid samples. 

There are 2,130 b12 pharmaceutical grade suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and Philippines, which supply 99%, 1%, and 1% of b12 pharmaceutical grade respectively. 

B12 pharmaceutical grade products are most popular in North America, South America, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 329 with Other, 227 with ISO9001, and 39 with GMP certification.