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Natto

Natto sensitivity may stem from soy proteins, fermentation byproducts, or histamines.

🌱 What is Natto?
Natto is a traditional Japanese food made from fermented soybeans. It has a strong aroma, sticky texture, and savory, umami-rich flavor. Natto is known for its natural probiotic content and is a good source of protein and vitamin K2.


🤔 Why Might a Sensitivity to Natto Occur?

A sensitivity to natto may occur due to:

  • Soy Proteins: Natto contains active soy proteins such as glycinin and beta-conglycinin, which may be difficult for some individuals to process.

  • Bacillus subtilis: The beneficial bacteria used for fermentation may overwhelm sensitive digestive systems.

  • Histamines: As a fermented food, natto contains higher histamine levels, which may contribute to reactions.

  • Isoflavones: Natural plant compounds in soy that may create digestive or hormonal sensitivities in certain individuals.


🛠️ What Can I Do About It?

  • Avoid natto for 8 weeks and observe any changes in how you feel.

  • Check labels for foods that may include natto-based ingredients.

  • Choose alternatives such as tolerated legumes or non-soy fermented foods.

  • Reintroduce natto gradually after the elimination period to evaluate your response.


💊 Supportive General Supplements

Consider:

  • Digestive Enzymes: Support the breakdown of soy proteins and fermented components.

  • Probiotics: Encourage a balanced gut environment that may improve general digestive wellness.

  • Quercetin: Helps support the body’s natural inflammatory responses and may assist with histamine-related sensitivities.

  • L-Glutamine: Supports the gut lining and overall digestive comfort.


🌟 Why Might I Have a Sensitivity to Natto but Not Other Soy Products?

Key differences include:

  • Fermentation: Natto’s fermentation process introduces high histamine levels and active bacteria not present in non-fermented soy.

  • Nattokinase: An enzyme unique to natto that may be difficult for some individuals to process.

  • Protein Activity: Natto contains more active soy protein structures than tofu or soy milk.

  • Processing Differences: Other soy products undergo processes that may reduce components that are more active in natto.


🍽️ Popular Dishes with Natto

  • Natto rice bowls

  • Sushi rolls containing natto

  • Natto added to miso broths


🍽️ Alternatives (If Tolerated)

  • Tempeh

  • Miso

  • Lentils

  • Chickpeas

This information is provided for general educational and wellness purposes only, based on publicly available sources. It is not intended to diagnose, treat, or prevent any condition. Individuals concerned about nutrient deficiencies should consult a qualified healthcare professional for personalized guidance.