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About product and suppliers:
        Alibaba.com offers 260 phosphatidylserine ps 50% products. such as free samples. 

There are 260 phosphatidylserine ps 50% suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of phosphatidylserine ps 50% respectively. 

Phosphatidylserine ps 50% products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 49 with ISO9001, 46 with Other, and 8 with GMP certification.