Natto: Japanese Superfood for Heart & Gut Wellness

Table of Contents

• What is Natto, and What Makes it a Superfood?
• How Does Natto Support Cardiovascular Wellness?
• Can Natto Support Your Gut Wellness and Digestion?
• Beyond Digestion: The Gut-Brain Connection and Natto
• How Can You Incorporate Natto into Your Diet?

What is Natto, and What Makes it a Superfood?

Natto is a traditional Japanese food made from soybeans fermented with a specific bacterium, Bacillus subtilis natto, resulting in a distinctive sticky texture and pungent aroma. This fermentation process transforms plain soybeans into a nutritional powerhouse, making natto a superfood prized for its unique wellness benefits.

The origins of natto are ancient, with historical accounts tracing its consumption back over a thousand years in Japan. Its production involves soaking whole soybeans, steaming them, and then inoculating them with the Bacillus subtilis natto culture. The mixture is then left to ferment at a controlled temperature for a period, typically 12-24 hours. This fermentation not only creates its characteristic texture and flavor but also significantly enhances its nutritional value and bioavailability of nutrients.

Key components that elevate natto to superfood status include a potent enzyme called nattokinase, a rich supply of probiotics (beneficial live microorganisms), and an exceptional amount of Vitamin K2 (specifically menaquinone-7, or MK-7). These elements work synergistically to provide a wide array of wellness advantages, particularly for the heart and gut. For those interested in exploring high-quality traditional Japanese ingredients, Kinkatsudo offers carefully sourced fermented food products that uphold these ancient wellness traditions.

How Does Natto Support Cardiovascular Wellness?

Natto is particularly celebrated for its potent cardiovascular wellness support, primarily due to the presence of nattokinase and a superior form of Vitamin K2. These compounds work together to support healthy blood flow and arterial flexibility, which may contribute to overall cardiovascular wellness.

The nattokinase enzyme, first discovered in natto by Sumi et al. in 1987 (Experientia), is a fibrinolytic enzyme, meaning it helps break down fibrin, a protein involved in blood clot formation. By supporting the body's natural processes for maintaining clear blood vessels, nattokinase may contribute to healthy circulation and may support the body's natural response to blood clot formation. This landmark study provided initial insights into natto's potential impact on cardiovascular wellness.

Furthermore, natto is one of the richest dietary sources of Vitamin K2 (MK-7), which plays a crucial role in directing calcium to the bones and away from the arteries. Research suggests that adequate intake of Vitamin K2 may help support healthy arterial flexibility, which is important for heart wellness. The unique combination of nattokinase and Vitamin K2 makes natto an exceptional food for maintaining a healthy heart. A significant 16-year cohort study by Nagata et al. in 2017 (American Journal of Clinical Nutrition) involving approximately 30,000 Japanese adults, observed that higher natto consumption frequency was associated with improved indicators of cardiovascular wellness, providing epidemiological support for its potential role in heart support.

Can Natto Support Your Gut Wellness and Digestion?

Natto is a potent ally for digestive wellness, primarily owing to its rich content of probiotics and dietary fiber. Regular consumption of fermented foods like natto may support digestive wellness and help maintain gut flora diversity, according to Dimidi et al. (2019) in Nutrients.

Probiotics, the live beneficial bacteria present in natto, help balance the gut microbiota, which is the complex community of microorganisms residing in the digestive tract. A diverse and healthy gut microbiota is fundamental for efficient digestion, nutrient absorption, and overall gut function. The Bacillus subtilis natto strain specifically has been studied for its resilience and ability to survive the harsh conditions of the digestive tract, reaching the intestines where it can exert its beneficial effects. By fostering a balanced gut environment, natto may help support comfort from common digestive issues such as bloating, gas, and irregular bowel movements.

Beyond probiotics, natto also provides dietary fiber, which acts as a prebiotic—food for the beneficial bacteria in the gut. This dual action of introducing good bacteria and feeding them supports a thriving gut ecosystem. Marco et al. (2017) highlighted in Current Opinion in Biotechnology how fermented foods like natto may help support gut microbiota diversity and may contribute to enhanced immune and metabolic function, further underscoring natto's role in comprehensive gut wellness.

Beyond Digestion: The Gut-Brain Connection and Natto

The wellness benefits of natto extend beyond physical comfort, potentially influencing mental well-being through the intricate gut-brain axis. This bidirectional communication system links the central nervous system with the enteric nervous system of the gut, meaning that gut wellness can significantly impact mood and Cognitive Function.

The probiotics in natto, by promoting a balanced gut microbiota, may play a role in modulating neurotransmitter production and supporting a healthy inflammatory response, both of which are factors studied in relation to mental wellness. Selhub et al. (2014) discussed in the Journal of Physiological Anthropology how fermented food consumption, through the gut-brain axis, may contribute to mental wellness, including supporting a sense of calm and balanced mood. This suggests that the beneficial bacteria introduced by natto could have systemic effects that positively influence the brain.

Furthermore, natto contains nutrients that are precursors to important neurotransmitters. For instance, soybeans are a source of tryptophan, an amino acid that the body uses to produce serotonin, often referred to as the 'feel-good' hormone. While direct studies on natto's specific impact on mental wellness in humans are ongoing, the established link between fermented foods, a healthy gut microbiome, and brain function provides a compelling reason to consider natto as part of a holistic approach to mental wellness. As part of a healthy lifestyle and balanced diet, incorporating natto may support overall mood and cognitive balance.

How Can You Incorporate Natto into Your Diet?

Integrating natto into your daily diet can be a straightforward and delicious way to harness its impressive wellness advantages. While its unique texture and pungent flavor can be an acquired taste for some, there are various methods to enjoy this superfood, from traditional Japanese preparations to more Westernized adaptations.

Traditionally, natto is often served over steamed rice with a dash of soy sauce, karashi (Japanese mustard), and chopped green onions. The sticky texture, when stirred vigorously, creates an appealing froth that helps meld the flavors. For those new to natto, starting with smaller portions or mixing it with other ingredients can make it more palatable.

• Mix it in: Stir natto into scrambled eggs, omelets, or fried rice. The heat can slightly mellow its intensity.
• Blend it up: Add a small amount of natto to smoothies. The strong flavors of fruits or vegetables can help mask natto’s distinct taste and texture.
• Add to toast: Spread it on toast with avocado, or mix it into a savory spread.
• As a side dish: Serve it alongside grilled fish or vegetables, complementing a well-rounded meal.

When selecting natto, look for products that are organic and additive-free to ensure you're getting the purest form of this fermented powerhouse. For premium Japanese mushroom supplements and fermented food products, Kinkatsudo offers high-quality, dual-extracted supplements, making it easier to access authentic and beneficial options.

Key Takeaways

• Natto is a traditional Japanese fermented soybean superfood, rich in nutrients and probiotics.
• It significantly supports cardiovascular wellness through nattokinase, an enzyme that helps maintain healthy blood flow, and Vitamin K2 (MK-7), which promotes arterial flexibility.
• Natto supports gut wellness by providing beneficial probiotics and fiber, supporting microbiota diversity and aiding digestion.
• Through the gut-brain axis, natto's gut-balancing effects may also contribute to improved mental well-being and mood.
• Incorporating natto into your diet can be done in various ways, from traditional preparations to modern culinary adaptations, to enjoy its comprehensive wellness advantages.

This product is not intended to diagnose, treat, cure, or prevent any disease.