20,000 Units of Activity. Vascular Support. Healthy Immune Function. Serrazimes is a proteolytic blend composed of enzymes derived from the edible fungi, Aspergillus oryzae and Aspergillus melleus. Serrazimes acts systemically in the maintenance of a balanced immune system response by helping to break down protein-based immune cell secretions, thereby facilitating their elimination. In this way, Serrazimes may promote vascular and respiratory health by supporting the body’s own natural processes for both drainage and repair.