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About product and suppliers:
        Alibaba.com offers 5,259 vitamin biotin products. About 43% of these are vitamins, amino acids and coenzymes, 29% are animal pharmaceuticals, and 14% are vitamins. 

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

There are 5,284 vitamin biotin suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Israel, which supply 87%, 4%, and 1% of vitamin biotin respectively. 

Vitamin biotin products are most popular in North America, South America, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 1,074 with ISO9001, 527 with Other, and 225 with GMP certification.