Toxic mushrooms can cause GI distress, liver and kidney failure, and death. Abdominal pain, nausea, vomiting, and diarrhea might appear 20 minutes after consuming them.
Cherry and other stone fruit kernels contain cyanogenic glycoside. Chewing kernels can turn cyanogenic glycoside into hydrogen cyanide, which is toxic to humans.
This plant can create hydrocyanic acid under certain conditions. Roots, leaves, stems, and young berries contain the most of these chemicals.
Poison Control says potatoes include glycoalkaloids solanine and chaconine. Each "toxic cell breakdown causes vomiting, stomach discomfort, and diarrhea.
Raw kidney beans contain lectins, notably phytohaemagglutinin, says Food Network. Lectins can clump red blood cells and impair GI absorption.
The leaves contain oxalic acid and are harmful to people and animals. Small leaf scraps are unlikely to make you sick, but eating several huge leaves could.
Cassia cinnamon (the cheaper, more generally available type) includes large quantities of coumarin, which can have detrimental health effects.
These plants contain a rash-causing oil called urushiol. Mangoes only have urushiol in the peel, surrounding the stem. Fruit bruises release urushiol.
Unripe lychee is fatal. For years, India, Vietnam, and other lychee-growing countries had seasonal child illness outbreaks.