Non GMO The Enzyme Experts Therapeutic #1 Selling Enzyme Brand Dietary Supplement Vegan & Kosher Kosher Parve No Fillers Added Supports Cardiovascular Health Enhances circulation Promotes production of plasmin 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. 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.