Nattokinase is an enzyme from natto, a fermented soybean dish. The enzyme promotes healthy blood flow by encouraging fibrinolytic activity, the process that breaks down clot-forming proteins.
Take it as a capsule on an empty stomach for best absorption. Nattokinase is not a vitamin or nutrient. People use it as a targeted supplement for circulatory support.
Nattokinase thins the blood naturally. Do not take it with blood-thinning drugs such as warfarin, apixaban, aspirin, or clopidogrel unless a doctor supervises. Stop using it before surgery and if you have a bleeding condition. Avoid it during pregnancy or while breastfeeding.