Look out for indications of mold. If you see any green mold, white fuzzy mold, or dim black spots (mildew) to the mushroom, never eat it. Don’t get worried if the thing is blue staining—This is often prevalent in Psilocybe mushrooms and an indicator that the mushrooms consist of psilocybin. https://beauwjylw.wikinewspaper.com/3705279/the_5_second_trick_for_mushroom_chocolate_bars_recall