Cassava: An Essential Plant at the Heart of a Deadly Paradox
Whether in the form of flour, tapioca pearls, or crispy chips, cassava is a staple present throughout global diets. Originating from South America, it is now cultivated across every continent. Each year, over 500 million people consume cassava, with its harvest measured in hundreds of millions of tons worldwide.
Yet, behind this common food lies an unsuspected danger that can have serious consequences.
Why is Cassava Called the “Deadliest Food in the World”?
The reason lies in the natural substances contained within this root: cyanogenic glucosides. These chemical compounds are produced by the plant as a defense mechanism against insects and predators. The problem arises when cassava is improperly prepared, as it can then release cyanide, a highly dangerous poison.
The World Health Organization (WHO) has been raising alarms about this issue for several years. Regular, uncontrolled consumption of cassava containing these toxins can lead to severe illnesses, notably a neurological disease known as konzo. This irreversible paralysis of the lower limbs primarily affects populations living in extreme poverty or conflict zones.

Approximately 200 deaths each year are attributed to the consumption of poorly prepared cassava. Although this number may seem low compared to the hundreds of millions of users, it suffices to justify the tuber’s alarming reputation.
When is the Risk Associated with Cassava the Highest?
Incidents mainly occur during food crises or periods of war. For example, in Venezuela, some groups forced to survive in harsh conditions have had to consume inadequately treated cassava due to a lack of alternatives. The scarcity of resources often leads to skipping essential preparation steps, greatly increasing the dangers.
The so-called “bitter” varieties of cassava are particularly toxic, especially when consumed as part of a protein-poor diet. This dual factor creates a highly risky cocktail, particularly for the most vulnerable populations.
How to Enjoy Cassava Without Endangering Your Health?
Fortunately, when consumed correctly, cassava is not only safe but also nutritious. The most effective method relies on time: soaking the root in water for at least 24 hours helps eliminate the majority of the toxins present. Cooking also plays a crucial role, as it breaks down these toxic compounds.
In regions where cassava is a dietary cornerstone, these preparation techniques are passed down through generations. As awareness grows, the number of poisonings decreases, representing a significant global public health advancement.
Nature sometimes offers treasures that only require careful handling to be fully and safely enjoyed.