Soy toxicity

Can soy be toxic?

When is soy toxic?

Non-germinated raw soybeans are toxic because they contain the following components with toxic properties for the body:


Enzyme inhibitors (trypsin and other)

Lectins (soyin or soy hemagglutinin)

Antithyroid Factors


Photo of soybeans

How soy toxicity is eliminated?

Soy toxicity is removed by boiling the grain until completely cooked.

Germinated soybean loses toxicity and can be eaten raw.

What can happen to a person after eating raw soy?

Among the reactions that saponins can produce, we have: vomiting, stomach pain, bleeding, dizziness, ulcers, etc..

Once passed into the blood, they can damage the kidneys and liver and affect the nervous system and can cause cardiac arrest.

Lectins affect the red blood cells. They can cause muscle spasms, cramps, diarrhea, bloody stools. etc.

Germinated soybeans

Raw germinated soybeans are not toxic. Germination process gets rid off poisonous components

Is raw soy also poisonous to animals?

Fish and insects are affected by soy toxicity. Among farm animals, sheep and cows are not affected by eating this type of legume.

Birds are poisoned showing abnormalities in the pancreas, thyroid and liver.

Death sometimes occurs in animals due to lack of nutrients since enzyme inhibiting factors get the intestine not to be able to digest food properly.

In order to soy not to affect to animals, it must be treated with heat, ultraviolet rays or oxidation.

* Related information:

Soy contraindications

Soy for babies and children

Soy lecithin

punto rojoMore information on soy and derivatives.

This article was endorsed by Elisenda Carballido - Dietitian nutritionist. Postgraduate in Phytotherapy and master in Nutrition and Metabolism.
Written by Editorial Botanical-online team in charge of content writing

22 March, 2022

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