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About product and suppliers:
        Alibaba.com offers 581 grey oyster mushroom products. About 76% of these are fungus, 48% are oyster mushrooms, and 2% are shiitake. 

A wide variety of grey oyster mushroom options are available to you, such as free samples. 

There are 469 grey oyster mushroom suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Vietnam, which supply 97%, 1%, and 1% of grey oyster mushroom respectively. 

Grey oyster mushroom products are most popular in Southeast Asia, Domestic Market, and Oceania. 

You can ensure product safety by selecting from certified suppliers, including 161 with Other, 66 with ISO22000, and 42 with HACCP certification.