Why do false morel mushrooms make you sick? These mushrooms contain the toxin gyromitrin which is toxic to the liver.

Can morels upset your stomach?

are generally safe to eat as long as they have been cooked thoroughly. However, eating raw morels can cause gastric upset. Also, some individuals have allergies or intolerances for certain types of morels. For these reasons, morels are considered generally safe to eat but should be consumed with caution the first time.

Can you eat too many morels?

Any poisons in the soil WILL be absorbed by the mushrooms and if you eat them, by your stomach. ... Never eat too many morels. I know, some of you may argue that there is no such thing as too many morels. But like most things in life, morels and mushrooms are best in moderation.