Some foods we eat every day can be dangerous—or even deadly—if not prepared correctly. Cassava, a staple in South America, contains compounds that release cyanide. To be safe, it must be soaked and thoroughly cooked before eating.

Starfruit poses another hidden risk. While harmless to most, it contains neurotoxins that can be dangerous—even fatal—for people with kidney disease. For them, just a small amount can trigger serious complications.

Cherry pits, bitter almonds, and apple seeds also carry cyanide-producing compounds. Accidentally swallowing a few seeds is unlikely to cause harm, but consuming them in large amounts can be toxic.

Green potatoes are another surprising hazard. When exposed to light, they produce solanine, a natural poison that can lead to nausea, headaches, and even nerve damage.

Certain nuts and fruits carry risks too. Raw cashews and mango skin contain urushiol—the same compound found in poison ivy—that can cause painful allergic reactions.

Seafood lovers should beware of pufferfish, or fugu. It contains tetrodotoxin, a poison so deadly that only specially trained chefs are allowed to prepare it safely in Japan.

Even common kitchen spices aren’t risk-free. Nutmeg, when consumed in very large quantities, can cause hallucinations, dizziness, and even seizures due to its psychoactive compounds.

Other plant-based foods can also be harmful. Elderberries, rhubarb leaves, and raw kidney beans contain natural toxins that can cause serious illness if not cooked properly. Understanding these risks is essential to ensure our meals stay safe—and don’t turn deadly.