Look out for signs of mould. If you see any inexperienced mould, white fuzzy mold, or dim black places (mildew) within the mushroom, will not eat it. Don’t get worried if you see blue staining—This can be prevalent in Psilocybe mushrooms and an indicator that the mushrooms consist of psilocybin.  https://psychedelicfarmmeds.com/product/wavy-bar-chocolate-mushroom/