Fibrin is a protein found in the blood. Maintaining healthy levels of fibrin promotes healthy coagulation of blood for an optimally functioning cardiovascular system.Natto-K contains specialized blends of enzymes including Nattokinase with NSK-SD—the only form of nattokinase that does not contain vitamin K2—to enhance the body’s production of plasmin. Plasmin breaks down excess fibrin, which may improve circulation. Natto-K may help maintain already healthy levels of blood clotting factors within a healthy range.Recommended Use: 1 capsule three times daily on an empty stomach, one hour before or two hours after a meal.Consult physician prior to use if pregnant or nursing.Thera-blend is an exclusive process that combines multiple strains of enzymes that work in specific pH levels, resulting in superior performance in the body.NO FILLERS ADDED