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About product and suppliers:
        Alibaba.com offers 5,292 vitamin d3 products. About 24% of these are vitamins, amino acids and coenzymes, 22% are vitamins, and 16% 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 5,355 vitamin d3 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United States, and India, which supply 88%, 3%, 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 1,011 with ISO9001, 733 with GMP, and 512 with Other certification.