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The multi-elemental composition of 4 edible wild-growing mushroom species that commonly occur in Polish forests was compared to 13 cultivated mushroom species available in trade. A considerable variation in the macroelements content was revealed with cultivated species containing higher amounts of macroelements. The mean content of B, Co, Cr, Fe, Pb, Pr, Pt, Sb, Sm, Sr, Te, and Tm was higher in cultivated mushroom species, while the opposite was noted for Ba, Cd, Cu, Hg, La, Mo, Sc, and Zn. Selected cultivated forms exhibited increased content of Al ( F .  velutipes ), As ( H .  marmoreus ,  F .  velutipes ), Ni ( P .  ostreatus ,  A .  polytricha ,  H .  marmoreus ), and Pb ( P .  ostreatus ,  A .  polytricha ,  F .  velupites,  and  L .  edodes ). Wild-growing species,  B .  boletus ,  I .  badia,  and  S .  bovinus  contained high Hg levels, close to or exceeding tolerable intakes. Compared to cultivated mushrooms, they also generally revealed a significantly increased content of Al (with the highest content in  B. edulis  and  I. badia ), As and Cd (with the highest content in  B. edulis  and  S. bovinus  in both cases). In turn, the cultivated mushrooms were characterized by a higher content of Ni (particularly in  A. bisporus ) and Pb (with the highest content in  P. eryngii ). The exposure risks may, however, differ between wild and cultivated mushrooms since the former are consumed seasonally (although in some regions at a high level), while the latter are available throughout the year. Both cultivated and wild-growing mushrooms were found to be a poor source of Ca and Mg, and only a supplemental source of K, Cu, Fe, and Zn in the human diet. These results suggest that mushrooms collected from the wild or cultivated, should be consumed sparingly. The study advocates for more strict monitoring measures of the content of toxic metals/metalloids in mushrooms distributed as food, preferentially through the establishment of maximum allowance levels not limited only to a few elements and mushroom species.

A comparison of toxic and essential elements in edible wild and cultivated mushroom species