Over 200 People Are Killed By The “World’s Deadliest Food” Every Year, But Almost 500 Million People Still Eat It

Every year, over 200 people die from consuming what is often dubbed the “world’s deadliest food,” yet nearly 500 million people still eat it regularly. There are many foods that could fill you up quickly, but you wouldn’t find them on your dinner plate every night due to safety concerns. So, what is the food that is both potentially deadly and widely consumed around the globe?

The answer might surprise you. It’s not an exotic delicacy or a strange, foreign ingredient. It’s a humble root vegetable—cassava, also known as manioc, yuca, or the source of tapioca .

I first learned about cassava’s dark side while reading about global food staples. I had no idea that the plant behind my favorite bubble tea pearls and gluten-free flour could be so dangerous. It felt like discovering that water could be flammable. But the more I learned, the more fascinated I became. How can one plant be both a lifeline for half a billion people and a silent killer?This isn’t a story about avoiding dangerous foods. It’s a story about knowledge, tradition, and the incredible ingenuity of communities that have turned a toxic plant into a safe, nourishing staple. Let’s dive into the fascinating, and sometimes frightening, world of the world’s deadliest food.

The food in question is cassava. This unassuming, woody shrub is grown for its starchy, tuberous roots. It is a major source of carbohydrates for more than 800 million people worldwide, acting as a “food security crop” in developing nations because it is drought-resistant and can grow in poor soils .

The numbers are staggering: nearly 500 million people rely on cassava as a primary part of their daily diet . It’s boiled, fried, fermented, and ground into flour, serving as a cornerstone of food security across sub-Saharan Africa, Asia, and Latin America.

But there’s a catch. A deadly one.

Cassava contains compounds called cyanogenic glycosides, which are essentially natural defenses that protect the plant from pests and animals. When these compounds are broken down—either by enzymes in the plant itself or, more dangerously, in the human gut after consumption—they release hydrogen cyanide, a potent and fast-acting poison .

If cassava is not processed and cooked correctly, eating it can lead to cyanide poisoning, causing symptoms ranging from dizziness and headaches to paralysis, permanent disability, and death .