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About product and suppliers:
        Alibaba.com offers 5,082 vitamin d3 products. About 27% of these are vitamins, amino acids and coenzymes, 19% are vitamins, and 17% are animal pharmaceuticals. 

A wide variety of vitamin d3 options are available to you, such as medicine grade, food grade, and cosmetic grade. You can also choose from free samples, paid samples. 

There are 5,266 vitamin d3 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United States, and India, which supply 89%, 4%, and 1% of vitamin d3 respectively. 

Vitamin d3 products are most popular in North America, Western Europe, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 844 with GMP, 827 with ISO9001, and 409 with Other certification.