This Traditional Japanese Breakfast is Beneficial for Your Gut, Heart, and Bones
Japan has one of the highest life expectancies in the world—and it's believed diet is a big part of why.
Reported by Vogue.
Japan consistently ranks in the top five globally for life expectancy — and while Okinawa's Blue Zone status gets most of the credit, the country's diet deserves equal attention. One of its most quietly powerful staples: natto, a fermented soybean dish eaten at breakfast across Japan's eastern regions that's generating serious interest for what it does to your gut, heart, and bones, according to Vogue.
The origin story alone is cinematic. Legend credits a 12th-century samurai, Minamoto no Yoshiie, whose army accidentally fermented boiled soybeans wrapped in straw during a military campaign. Today, the process is more deliberate — soybeans are fermented with Bacillus subtilis bacteria — but the result is just as primal: a sticky, stringy, deeply umami food with a pungent smell that challenges Western palates. Per the USDA, 100g delivers 19.4g of protein (roughly three eggs' worth), 5.4g of fiber, 729mg of potassium (more than a banana), and 217mg of calcium. That's a nutritional profile most supplements can't compete with.
What it actually does for your body
As a probiotic, natto supports the microbiome, aids digestion, and strengthens immune function — notable given that the majority of immune cells live in the gut. Its vitamin K content is equally significant: a 2020 study in the Journal of Nutrition found that habitual natto intake may reduce the risk of osteoporotic fractures in postmenopausal women. On the cardiovascular side, a 2022 scientific review confirmed that natto's predominantly polyunsaturated fat profile can help lower cholesterol and reduce the risk of heart disease and stroke. That's three major body systems addressed by a single breakfast food.
If the smell is your barrier to entry, start with context. Natto pairs well with rice, raw egg yolk, sesame oil, kimchi, chives, or avocado — toppings that soften the bitterness while preserving the benefits. It folds into miso soup, works inside sushi rolls, and holds its own alongside grains like barley, millet, or quinoa. The texture is the bigger adjustment, but once you get past it, you're eating one of the most nutrient-dense fermented foods on the planet.
Longevity isn't built on one ingredient — but if the evidence points anywhere, it's toward fermentation, fiber, and food with actual history behind it.
Read the original at Vogue.
