Swanson Nattokinase 30 CapsSwanson Nattokinase 30 Caps About Vitamins. co. nz Swanson Nattokinase Nattokinase supports cardiovascular wellness and healthy circulation. Natto is a staple of the Japanese diet although this fermented soybean dish has remained relatively unknown in the West. The fermentation process produces the unique enzyme Nattokinase. Research suggests that Nattokinase may be an effective dietary approach for supporting healthy blood flow, thereby promoting