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About product and suppliers:
        Alibaba.com offers 3,198 b12 pharmaceutical grade products. About 76% of these are vitamins, amino acids and coenzymes, 6% are auxiliaries and other medicinal chemicals, and 6% are antibiotic and antimicrobial agents. 

A wide variety of b12 pharmaceutical grade options are available to you, such as free samples, paid samples. 

There are 3,154 b12 pharmaceutical grade suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United Kingdom, and Vietnam, which supply 98%, 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 1,108 with ISO9001, 967 with GMP, and 329 with Other certification.