There's some early evidence that nattokinase may have benefits for heart and artery health. One study shows that a nattokinase supplement lowers the risk of blood clots after long plane flights. It may help reduce narrowing of the arteries. Other studies show that nattokinase may help lower blood pressure.

Are natto supplements good for you?

Summary: Natto contains fiber, probiotics, vitamin K2 and nattokinase. This combination may help reduce cholesterol and blood pressure levels and decrease the risk of heart disease.

Is it safe to take nattokinase every day?

Amounts and Dosage

There is no set recommendation for nattokinase, but studies suggest its health benefits come with an oral dose of 100 to 200 milligrams a day.