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About product and suppliers:
        Alibaba.com offers 8,932 b12 vitamin products. About 34% of these are vitamins, amino acids and coenzymes, 25% are animal pharmaceuticals, and 10% are other healthcare supply. 

A wide variety of b12 vitamin options are available to you, 

There are 8,815 b12 vitamin suppliers, mainly located in Asia. The top supplying countries are United States, China, and India, which supply 1%, 93%, and 1% of b12 vitamin respectively. 

B12 vitamin products are most popular in United States, United Kingdom, and Australia.