Natto纳豆

Food · Grains & Legumes · 发酵豆

枯草芽孢杆菌发酵的大豆 · 维 K2 (MK-7) 最丰富的常见食物 · K2 把钙引向骨头而非血管 · 纳豆激酶溶血栓证据有限别夸大 · 益生菌+纤维 · 华法林者要当心

What is natto · a soybean rewritten by bacteria

Stop 1/7

纳豆是什么 · 一种被菌改写的大豆

Natto is a traditional Japanese fermented food: steamed whole soybeans are inoculated with Bacillus subtilis var. natto, fermented in a warm environment for about a day, yielding a sticky, stringy, pungent mass of beans. It belongs to the fermented branch of the soy family alongside miso, tempeh, and soy sauce (for the soybean's own story, dive to soy-tofu).

What is worth telling here is not the already-known fact that soy is nutritious, but what fermentation actually rewrote. The same soybean, after a day of work by the bacillus, undergoes three changes:

Anti-nutrients fall: fermentation breaks down phytate and similar compounds in soy, making minerals easier to absorbNew nutrients are created: the bacteria synthesize a large amount of vitamin K2 (MK-7) — natto's signature, unpacked in the next sceneLive microbes and metabolites arrive: probiotics, fiber, and an enzyme called nattokinase (which we will discuss honestly later)
In other words, natto is not 'soy with some flavor added,' but 'soy deeply processed by microbes.' This island's job is to make clear what truly sets it apart (vitamin K2), while pulling the over-hyped part (nattokinase dissolving clots) back to the scale of the evidence.

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