Look out for indications of mold. If you see any environmentally friendly mold, white fuzzy mold, or darkish black places (mildew) on the mushroom, will not consume it. Don’t fear if the thing is blue staining—This is often widespread in Psilocybe mushrooms and an indicator which the mushrooms comprise psilocybin. https://magicchocolates.co.uk/product/one-up-multiverse-matcha-milk-tea-chocolate-bar/