There are many foods that could fill you up quickly, but you wouldn’t find them on your dinner plate every night. So, what is the food that’s both deadly and widely consumed around the globe?

Cassava, a plant and a staple food for many, plays an important role in the diets of millions of people worldwide. Each year, it is consumed by over 500 million people, and hundreds of millions of tons of cassava are grown around the world.

Originating in South America, cassava is both a plant and a well-known food, but it also comes with significant risks. The plant’s stems, peel, and leaves are toxic and can produce hydrogen cyanide, making it potentially fatal if consumed improperly.

The World Health Organization (WHO) reports that around 200 people die annually from eating improperly prepared cassava. This is why it has earned the grim title of the “world’s deadliest food.”

The WHO explains: “Cassava tubers contain varying amounts of cyanogenic glucosides that serve as a defense against animals and insects. When these glucosides are not processed correctly, cassava can release cyanide, leading to high dietary cyanide exposure.”

Such dangerous exposure is especially prevalent during times of famine and war. Cyanide poisoning from cassava is linked to several severe diseases, including konzo.

Konzo is a debilitating, irreversible condition marked by sudden paralysis in the legs, which is often a result of consuming bitter cassava, particularly when combined with a low-protein diet. This condition is most commonly found in regions suffering from extreme poverty, where it can occur sporadically or in epidemics.

Despite its deadly reputation, millions of people continue to eat cassava every day without issue. This raises the important question: how can you make sure that cassava is safe to eat?

The key lies in proper preparation. Ensuring cassava is safe involves a lengthy process, including soaking the plant for up to 24 hours to remove harmful toxins.

In Venezuela, for example, people were consuming cassava in its dangerous form because they relied on salty foods to survive during times of food scarcity, as reported by El País.

While cassava remains a critical food source for many, understanding and practicing safe preparation methods can make it a nourishing and safe part of the diet. As awareness spreads about the risks associated with cassava, the methods for properly processing it are becoming more widely practiced, reducing the dangers of poisoning.