Allergen Information
Contains: Soy
Nutrition per 100g
Proteins › Plant-Based Proteins
Natto for Gestational Diabetes
Natto is a traditional Japanese food made from soybeans fermented with Bacillus subtilis. It is characterized by its slimy, sticky, and stringy texture, as well as its powerful, distinctive aroma. Considered a superfood, natto is exceptionally nutritious, providing a rich source of plant-based protein, fiber, and essential minerals. It is particularly famous for its high concentration of vitamin K2, which is crucial for bone health and cardiovascular function. The fermentation process also produces beneficial probiotics and the unique enzyme nattokinase.
Gestational Diabetes Profile
GD Suitability
GI Impact
lowGlycemic Index
44 · lowIs Natto safe with gestational diabetes?
Natto is an excellent food choice for managing gestational diabetes due to its impressive nutritional profile. Its low glycemic index, combined with high protein and fiber content, helps to slow down sugar absorption into the bloodstream. This leads to more stable blood glucose levels after meals, which is a primary goal in GD management. The probiotics present in natto also support gut health, which emerging research suggests is linked to improved metabolic control and insulin sensitivity. It is a nutrient-dense option that supports both maternal and fetal health.
How does Natto affect blood sugar during pregnancy?
With a low glycemic index of approximately 44, natto has a minimal impact on blood sugar levels. The significant protein and fiber content act as a natural brake on carbohydrate digestion, preventing the rapid glucose spikes that are common with other foods. Since natto is typically consumed cold, its low-GI properties are perfectly preserved, making it an ideal choice. It is important to be cautious with the accompanying sauce packets, as they may contain added sugars; opting for low-sodium soy sauce or using the packet sparingly is advisable.
What is a safe portion of Natto for gestational diabetes?
A suitable portion for gestational diabetes management is one standard single-serving container of natto, which is typically around 40 to 50 grams. This amount, visually about a quarter to a third of a cup, delivers a robust dose of protein and fiber without contributing excessive carbohydrates. This portion size is effective at promoting satiety and stabilizing blood sugar. We recommend discarding the sugary sauce packet and flavoring your natto with a small dash of low-sodium soy sauce or tamari instead to avoid hidden sugars.
How should I combine Natto to manage blood sugar during pregnancy?
To create a balanced, blood-sugar-friendly meal, pair natto with a source of complex carbohydrates and non-starchy vegetables. Serving natto over a small portion of brown rice or quinoa allows its protein and fiber to blunt the carbohydrate response from the grains. Add volume and nutrients by mixing in chopped scallions, shredded nori, or a side of steamed spinach or broccoli. For an even greater protein boost to further stabilize blood sugar, consider topping your natto bowl with a soft-boiled egg or some edamame.
Last reviewed: July 3, 2026
Talk to Your Healthcare Provider
Ratings and portion guidance on this page are for informational purposes only and do not constitute medical advice. Every pregnancy is different — always confirm your blood sugar targets and meal plan with your OB-GYN, midwife, or certified diabetes educator. By using this guide, you agree to our Terms and Conditions.
Content independently developed by SugarCurve Editorial Team, informed by the American Diabetes Association's Standards of Care in Diabetes, ACOG's gestational diabetes guidelines, and the IADPSG consensus criteria. Not endorsed by or affiliated with any referenced organization. · Last reviewed: July 2026
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