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        Alibaba.com offers 6,122 vitamin b12 products. About 37% of these are vitamins, amino acids and coenzymes, 16% are veterinary medicine, and 5% are immune & anti-fatigue. A wide variety of vitamin b12 options are available to you, such as feed grade, medicine grade, and food grade. You can also choose from free samples, paid samples. There are 6,142 vitamin b12 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and United States, which supply 93%, 1%, and 1% of vitamin b12 respectively. Vitamin b12 products are most popular in North America, Western Europe, and Mid East. You can ensure product safety by selecting from certified suppliers, including 1,188 with Other, 836 with GMP, and 739 with ISO9001 certification.
        
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