Then you are assuming that the forager that sold the mushroom to the grocery knows more than you. Don't do this. Learn, read a lot and take the control about wh

Then you are assuming that the forager that sold the mushroom to the grocery knows more than you. Don't do this. Learn, read a lot and take the control about what you eat and don't. This is the safest way. And this is not restricted to botany, you need geology knowledge also. Because edible species can poison you also. Some Agaricus species that are unmistakable and fine otherwise store high amounts of heavy metals when growing in contaminated soils. Don't ask me how I discovered it.