Rhubarb leaves - While rhubarb stalks are safe to eat, the leaves contain oxalic acid and anthraquinone glycosides, both toxic compounds.
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Blood clams - Blood clams harvested from contaminated waters can carry dangerous bacteria like hepatitis and typhoid, making them a health risk.
Elderberries - The uncooked berries, leaves, bark, and roots of the elderberry plant contain lectin and cyanide, which can cause nausea, vomiting, and diarrhea.
Death Cap mushroom - The Death Cap mushroom is among the deadliest fungi. Containing potent toxins like amatoxins, it can cause liver and kidney failure.
Nutmeg - Nutmeg, when consumed in large quantities, contains myristicin, a compound that can cause hallucinations, nausea, and seizures.
Starfruit - Starfruit contains neurotoxins that can be fatal for people with kidney disease. The toxins can cause severe confusion, seizures, or even death.
Raw honey - Raw honey contains botulism spores, which can be deadly for infants under the age of one.
Raw cashews - Eating raw cashews without roasting them can cause allergic reactions, skin rashes, or, in severe cases, respiratory distress.
African bullfrog - In Namibia, adventurous eaters may consume the entire frog, but its skin and organs contain toxins that can cause kidney failure if not prepared correctly.
Red kidney beans - Raw kidney beans contain phytohemagglutinin, a toxin that causes severe nausea, vomiting, and digestive distress.