Nattokinase

Eating natto every day delivers nattokinase, vitamin K2, and plant protein — with real benefits and a key warfarin warning. Here's the evidence.

Which foods have nattokinase naturally? Really just one — natto. Here's how much it delivers, why tempeh and miso don't count, and the vitamin K2 catch.

Nattokinase comes from just one common food — natto. Here's why tofu, tempeh, and miso don't count, plus how food compares to a supplement.

Does natto give you gas? The fermented food can — but the isolated nattokinase enzyme usually doesn't. Here's why the science separates them.

K2 and nattokinase both come from natto but are completely different—one is a fat-soluble vitamin, the other a clot-dissolving enzyme. Here is how each works and what to take.