Protocol for Life Balance Serrapeptase (60,000 SPU's) - 60 Capsules | Protocol for Life Balance Serrapeptase (serratiopeptidase) is a protein-digesting enzyme isolated from the friendly bacterium Serratia marcescens. Studies indicate that serrapeptase is absorbed intact from the digestive tract and that it acts systemically to support healthy immune system functions and promote the body’s normal healing processes. Some evidence suggests that serrapeptase may support respiratory health by helping to maintain normal mucus secretions.