Fibrin is a protein found in blood that is involved in the normal clotting of blood. However, fibrin build-up can result in chronic inflammation and cardiovascular issues. PeptizymeSP® contains Serratiopeptidase, an enzyme that helps break down fibrin, promoting healthy fibrin metabolism and a healthy respiratory system, lungs, joints, muscles, sinuses, and tissues. We specially coat the enzyme to survive the stomach's acidic environment, allowing its potent fibrinolytic activity to work systematically through the bloodstream.