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About product and suppliers:
        Alibaba.com offers 4,944 vitamin d3 products. About 26% of these are vitamins, amino acids and coenzymes, 20% are vitamins, and 17% are animal pharmaceuticals. 

A wide variety of vitamin d3 options are available to you, such as nutrition enhancers, anesthetic agents, and vitamins, amino acids and coenzymes. You can also choose from feed grade, food grade, and cosmetic grade. As well as from capsules, tablets, and powder. And whether vitamin d3 is improved bone density, immune & anti-fatigue, or improved nutritional anemia. 

There are 5,130 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 929 with ISO9001, 780 with GMP, and 481 with Other certification.