Nattokinase is an enzyme that breaks down the protein in the sticky part of natto, a traditional Japanese food. This product contains 3ꯠ FU of nattokinase. The capsule type is recommended for those who do not like natto. FU: A unit that expresses the magnitude of natto kinase's action. Nutrition Facts (per 3 capsules 660mg) Energy 2.2kcal Protein 0.19g Fat 0.008g Carbohydrate 0.38g Salt equivalent 0 ...