Is it safe for soy allergy sufferers to eat natto?
Quick Answer
No
Natto is a traditional Japanese food made from fermented soybeans. Therefore, it is not safe for individuals with a soy allergy to consume natto, as it could trigger an allergic reaction.

What Is It?
Natto is a traditional Japanese dish made by fermenting soybeans with Bacillus subtilis. It is known for its strong smell, unique texture, and high nutritional value.
Historical Context
Natto has been a staple in Japanese cuisine for over a thousand years. It is believed to have been introduced during the Jomon period (10,000 B.C. – 300 B.C.).
How to Tell
Symptoms of a soy allergy can range from mild to severe and include hives, itching, swelling, wheezing, abdominal pain, diarrhea, and even anaphylaxis in severe cases.
Why It Can Be Risky
Consuming natto when you have a soy allergy can lead to serious health risks.
These risks include severe allergic reactions that can lead to anaphylaxis, a life-threatening condition that requires immediate medical attention.
Safe Alternatives
For those with a soy allergy, alternatives to natto can include fermented foods that do not contain soy, such as sauerkraut, kimchi, or yogurt.