Nattokinase 100 mg, Value Size, 120 Veg Capsules, NOW FoodsNOW Nattokinase Capsules Promotes Circulatory Health. High Potency. 2,000 FU's of Activity. Vegetarian Vegan Product. Nattokinase is an enzyme isolated from Natto, a traditional Japanese fermented soy food. Natto has been consumed safely for thousands of years for its numerous health benefits. More recently, both clinical and non clinical studies have demonstrated that Nattokinase supports heart health and promotes healthy circulation. Each serving of