Neprinol AFD (Advanced Fibrin Defense) from Arthur Andrew Medical is a systemic enzyme blend containing a proprietary combination of serrapeptase, nattokinase, and additional enzymes and cofactors. This unique blend of all-natural enzymes and antioxidants helps to support the body’s normal blood cleansing process. Neprinol AFD works throughout the body to assist in keeping the heart, joints, brain, and other organs functioning normally while maintaining healthy circulation and immune function.