Source Naturals, Nattokinase NSK-SD, 200 mg, 30 CapsProduct Description Nattokinase is a systemic enzyme isolated from the traditional Japanese soy food natto. It has been shown to support healthy blood flow by assisting the circulatory clearing system of the body. Product Benefits Ingredients Supplement Facts Serving Size: 1 Capsule Amount Per Serving % Daily Value Nattokinase 2,000 FU (NSK SD) 100 mg Other Ingredients: microcrystalline cellulose, hydroxypropyl cellulose (capsule), silica, and