Cassava naturally contains compounds called cyanogenic glycosides. When the root is cut, crushed, chewed, or digested, these compounds can release hydrogen cyanide.
Eating large amounts of raw or improperly processed cassava may cause:
- Nausea and vomiting
- Dizziness
- Headaches
- Difficulty breathing
- Seizures
- In severe cases, death
How is it made safe?
Traditional preparation methods greatly reduce cyanide levels:
- Peeling the root
- Soaking it in water
- Fermenting it
- Drying it
- Thorough cooking
When these steps are followed, cassava is generally considered safe to eat.
Long-term health risks
Regular consumption of poorly processed cassava has been linked to:
- Chronic cyanide exposure
- Neurological disorders
- Thyroid problems, especially where iodine intake is low
- A rare paralysis syndrome called Konzo
Why do so many people still eat it?
For many communities, cassava is essential because:
- It is affordable.
- It grows where other crops fail.
- It helps prevent famine during droughts.
- It provides a reliable source of calories.
In some regions, giving up cassava is simply not practical because few alternatives are available.
Is cassava the deadliest food?
Not necessarily. The title is mostly a media phrase. Many foods contain natural toxins if prepared incorrectly, including:
- Cassava
- Fugu (contains a potent neurotoxin)
- Raw kidney beans
- Certain wild mushrooms
What makes cassava unique is that it is consumed by such a large number of people worldwide despite its potential toxicity when improperly prepared.
Bottom line: Cassava is not dangerous when properly processed and cooked. The risk comes from eating it raw or inadequately prepared, especially during food shortages when traditional preparation methods may be shortened.
