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About product and suppliers:
        Alibaba.com offers 47,686 so grade products. About 5% of these are hair extension, 1% are nuts, and 1% are vitamins, amino acids and coenzymes. 

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

There are 47,686 so grade suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of so grade respectively. 

So grade products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 10,456 with ISO9001, 10,405 with Other, and 1,851 with ISO14001 certification.