Most people know better than to eat wild mushrooms. In case you don’t, mushrooms can be incredibly toxic and even experts have mistaken a bad mushroom for a good one.
Not all poisonous mushrooms are brightly colored, either. Symptoms include kidney damage, nausea, vomiting, cramps, and diarrhea.
Some mushrooms are deadly and have been named as the death agent in several deaths including Emperor Claudius, a tsar and a pope. You are generally safe buying mushrooms from a grocery store.