Cassava | Description, Origin, Poison, Taste, Benefits, & Facts (2024)

Cassava | Description, Origin, Poison, Taste, Benefits, & Facts (2)

cassava, (Manihot esculenta), tuberous edible plant of the spurge family (Euphorbiaceae) from the American tropics. It is cultivated throughout the tropical world for its tuberous roots, from which cassava flour, breads, tapioca, a laundry starch, and an alcoholic beverage are derived. Cassava probably was first cultivated by the Maya in Yucatán.

Cyanide and food preparation

Cassava | Description, Origin, Poison, Taste, Benefits, & Facts (3)

Two cyanide-producing sugar derivatives, known as cyanogenic glucosides, occur in varying amounts in most varieties. Indigenous peoples developed a complex refining system to remove the poison by grating, pressing, and heating the tubers. To safely prepare most small “sweet” varieties for use as a vegetable, the skin should be generously peeled off, the tubers must be well cooked, and the cooking water drained off. Some cassava tubers are also soaked beforehand to leach the harmful chemicals. The preparation of cassava flour is usually from larger “bitter” roots, which require significant work to remove the poisons, and can include long soaking times, fermentation, and exposing the cassava paste to the air for several hours. The poison (hydrocyanic acid) has been used for darts and arrows. Improper preparation can cause acute cyanide intoxication, and long-term exposure to the cyanogenic glucosides is associated with goitres, chronic pancreatitis, and a nerve disorder known as ataxic neuropathy.

Cassava | Description, Origin, Poison, Taste, Benefits, & Facts (4)

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Physical description

Cassava | Description, Origin, Poison, Taste, Benefits, & Facts (5)

Cassava is a perennial plant with conspicuous, almost palmate (fan-shaped) leaves resembling those of the related castor-oil plant but more deeply parted into five to nine lobes. The fleshy roots are reminiscent of dahlia tubers. Different varieties range from low herbs to branching shrubs and slender unbranched trees. Some are adapted to dry areas of alkaline soil and others to acid mud banks along rivers.

Uses

Cassava is a good source of dietary fibre as well as vitamin C, thiamin, folic acid, manganese, and potassium. The tubers have a mild nutty taste and are commonly eaten as root vegetables in stews or as side dishes. Food items such as the gelatinous fufu of West Africa and the bammy of Jamaica come from cassava. Additional cassava products include an alcoholic beverage known as kasiri that is made by Indians in South America, the powdery casabe cakes of Yucatán, and tapioca, the only cassava product on northern markets. Cooked cassava leaves can also be eaten and are an important ingredient in soups and stews in parts of Central Africa.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Melissa Petruzzello.

Cassava | Description, Origin, Poison, Taste, Benefits, & Facts (2024)

FAQs

Cassava | Description, Origin, Poison, Taste, Benefits, & Facts? ›

Cassava is a good source of dietary fibre as well as vitamin C, thiamin, folic acid, manganese, and potassium. The tubers have a mild nutty taste and are commonly eaten as root vegetables in stews or as side dishes. Food items such as the gelatinous fufu of West Africa and the bammy of Jamaica come from cassava.

What does cassava root taste like? ›

The sweet variety is what you'll find at your local supermarket and in cassava-based products; its flavor profile is mild, somewhat nutty, and subtly sweet. When boiled, both its taste and texture are very reminiscent of a cooked potato ready for a mash or wedge of butter. Where does cassava grow?

Why is it OK to eat cassava even though it contains cyanide? ›

Sweet cassava roots contain less than 50 mg per kilogram hydrogen cyanide on fresh weight basis, whereas that of the bitter variety may contain up to 400 mg per kilogram. Sweet cassava roots can generally be made safe to eat by peeling and thorough cooking.

What are the effects of cassava poisoning? ›

Manifestations of cassava poisoning

Digestive disorders such as: abdominal pain, nausea, vomiting and diarrhea. Nervous disorders such as: dizziness, headache or worse may convulsions, convulsions, dilated pupils and then coma.

How to remove bitter taste from cassava? ›

Bitter varieties of cassava require more extensive processing, such as grating or pounding and soaking in water, before boiling.

Does cassava have bitter taste? ›

Globally, cassava cultivars are frequently divided by growers into "bitter" and "sweet/cool" types [10,25,26]. The two differ in taste as a result of cassava's cyanide generating mechanisms, with toxicity positively associating with bitterness [12, 36].

How to prevent cassava poisoning? ›

Therefore, some of the methods that can be used to reduce the toxicity of these cassava tubers are: Peeling: It is the most commonly used method in preparing cassava for human consumption. Hence, it involves peeling the outer cover (peels) of the tuber, which contain a considerable amount of cyanide.

How to remove cyanide in cassava? ›

Sun drying eliminates more cyanide than oven drying because of the prolonged contact time between linamarase and the glucosides in sun drying. Soaking followed by boiling is better than soaking or boiling alone in removing cyanide.

How long to cook cassava to remove cyanide? ›

The traditional method for removing cyanogens from pounded cassava leaves is by boiling in water which removes all cyanogens in 10 minutes.

Who should not eat cassava? ›

Allergies to latex: Cassava might cause an allergic reaction in people who are sensitive to latex. Iodine deficiency: Cassava might lower the amount of iodine absorbed by the body. For people who already have low levels of iodine, eating cassava might make this condition worse.

What is the toxic part of cassava? ›

LINAMARIN - THE TOXIC COMPOUND OF CASSAVA: According to Cooke (6), linamarin and lotaustralin, are the two different cyanogenic glucosides in cassava plant. Roots and leaves contain the highest amount of linamarin (8,14).

How fast is cassava poisoning? ›

Symptoms of cassava poisoning usually appear after eating about 3-7 hours. Depending on the case, the state of cassava poisoning has different clinical manifestations, can be severe acute poisoning or mild and slower poisoning.

What is the cassava toxin called? ›

Toxicity. Cassava roots, peels and leaves are dangerous to eat raw because they contain two cyanogenic glucosides, linamarin and lotaustralin. These are decomposed by linamarase, a naturally occurring enzyme in cassava, liberating hydrogen cyanide.

How to make cassava safe to eat? ›

Peel it. The peel of cassava root contains most of its cyanide-producing compounds, so it's a good idea to discard it before cooking and eating the vegetable. Soak it. Soaking cassava by submerging it in water for 48–60 hours before cooking it may reduce its content of harmful chemicals.

Is it safe to eat cassava with black lines? ›

The interior flesh should be white. Avoid roots with cracks, mold, soft spots, or sour smell. The flesh will have black specks, lines, or discoloration. If you do buy cassava with some black streaks hiding within the flesh, you can cut them out and use what remains.

Which is healthier, potato or cassava? ›

However edible varieties of cassava and potatoes grown for consumption are low on toxicity. Cassava is more healthier if you can eat the green leaves which are edible after blanching/boiling and straining and contain useful amounts of amino acids/proteins.

Does cassava taste like potatoes? ›

Cassava is a root vegetable that can be used in many of the same ways as potatoes. On the surface, this starchy tuber looks like a sweet potato or yam but with thicker skin. When cooked, cassava has a neutral flavor and soft, light texture. Cassava grows in tropical and subtropical climates.

Is cassava root good or bad for you? ›

When taken by mouth: Cassava that has been prepared properly is LIKELY SAFE for most people when eaten occasionally in normal food amounts. However, cassava that has not been prepared properly is POSSIBLY UNSAFE. Cassava that is prepared improperly can contain chemicals that are converted to cyanide in the body.

Is cassava root good for your gut? ›

Cassava is a good source of resistant starch, which supports gut health and blood sugar management. It also contains vitamin C, a key micronutrient that can enhance immune function and collagen production.

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