Natto is the only food source of nattokinase, but you can also buy it as a supplement. Research suggests that supplement intake is just as effective as consuming natto. There is interest in using nattokinase for its cardiovascular benefits such as reducing blood clotting and lowering blood pressure. Studies show https://cds-koch.de/website-title-nattokinase-kapseln-ihre-naturliche-unterstutzung-fur-die-gesundheit/