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About product and suppliers:
        Alibaba.com offers 523 grey oyster mushroom products. About 90% of these are fungus, 61% are oyster mushrooms, and 9% are shiitake. 

A wide variety of grey oyster mushroom options are available to you, such as shiitake, oyster mushroom, and fungus. You can also choose from raw, blanched, and blended. As well as from dried, frozen, and fresh. And whether grey oyster mushroom is brown, black, or white. 

There are 491 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 159 with Other, 76 with ISO22000, and 49 with HACCP certification.