The stalks of the rhubarb plant are edible, but the leaves can be deadly and cause trouble breathing, burning of the mouth and throat, and even seizures.
Rhubarb Leaves
There are potentially harmful chemicals called glycoalkaloids found in raw and green potatoes that should never be consumed.
Potatoes
Raw red kidney beans are more dangerous than white ones. Four or five of these can cause foodborne disease via lectin.
Red Kidney Beans
Untrained people should never eat raw or cooked wild mushrooms. Most store mushrooms can be eaten raw, but spices enhance their flavour.
Wild Mushrooms
Raw eggs shouldn't be eaten due to Salmonella contamination. To kill microorganisms, boil the egg to 62°C.
Eggs
Menu footnotes indicating that raw meat and poultry should not be consumed should always be read.
Beef, Pork, & ChickeN
Many meals include cassava. Raw root and leaves contain cyanide and should be baked or roasted for best taste and safety.
Cassava
Raw eggplant possesses the same glycoalkaloid component as raw potatoes, solanine, which isn't fatal but isn't optimal.
Eggplant
Boiling zucchini is healthier than frying or steaming. Leave the skin intact, as it contains the greatest nutrients.