Research out of Utah found that products claiming to contain 'wild mushrooms' often contain cultivated mushrooms.
Researchers used "DNA barcoding techniques to test what mushroom species made up 16 food products that listed “wild mushrooms” on their labels." "They found 28 species of mushrooms across all 16 food products. Almost all products that claimed to have wild mushrooms consisted of cultivated species, including oyster, shiitake, or portabella mushrooms. Only five products had contents that were accurately described on the label, and some included species that likely have yet to be described in academic literature."
"One packet of dried wild mushrooms from the online retailer contained a species from a group of fungi that includes the “Death Cap,” a notoriously poisonous mushroom known to cause renal failure in humans..... The authors contacted the online retailer to inform them of the potential dangers of the product. As of the paper’s publication, the dried mushrooms are still for sale. " Question - why didn't the researchers contact the FDA????
Regulating the practice of harvesting wild mushrooms is not easy. Much depends on the harvester being able to identify safe edible mushrooms from those that are dangerous, and even deadly. In the end, much is left to the regulatory authority to determine.
From the US Food Code (2017)3-201.16 Wild Mushrooms. (A) Except as specified in ¶ (B) of this section, mushroom species picked in the wild shall not be offered for sale or service by a FOOD ESTABLISHMENT unless the FOOD ESTABLISHMENT has been APPROVED to do so.
(B) This section does not apply to:
(1) Cultivated wild mushroom species that are grown, harvested, and processed in an operation that is regulated by the FOOD regulatory agency that has jurisdiction over the operation; or
(2) Wild mushroom species if they are in packaged form and are the product of a FOOD PROCESSING PLANT that is regulated by the FOOD regulatory agency that has jurisdiction over the plant.