Toxicity — levels/meanings
Deadly mushrooms have been known to be lethal to those who have ingested them. These mushrooms may cause fatal liver or kidney damage. Cooking mushrooms does not necessarily remove toxins. Effects may not be immediate. If there is any question as to whether a mushroom is deadly, do not eat it.
Poisonous mushrooms have severe effects if ingested, including, in some cases, death. They may contain neurotoxins causing inebriation and delirium, or cause kidney damage. Medical attention and hospitalization may be required. Effects may not be immediate.
Mushrooms considered toxic may cause nausea, vomiting, diarrhea, abdominal pain, or muscle pain. Though their effects may not be deadly, they can be severe and require medical attention.
Edible mushrooms have been ingested without severe health effects. Some individuals may still experience gastrointestial upset or allergic reactions. Exercise caution when eating wild mushrooms, particularly the first time a new edible species is encountered. Eat only a small amount of an edible mushroom with which you are not familiar. Some mushrooms also affect the body's metabolism, such as the ability to process alcohol.