ADVANCED SYSTEMIC ENZYME: Serrapeptase (known as Serratiopeptidase) is a powerful, proteolytic enzyme derived from silkworms known for its fibrinolytic properties (to support normal fibrin metabolism).* ACID-RESISTANT: Our Serrapeptase has a completely phthalate-free polymer applied to maximize efficacy.* RANGE OF USE: Promotes beneficial immune cell response, and healthy respiratory and sinus function. Supports muscle, joint, and overall body/tissue health.* ACHIEVE OPTIMUM HEALTH NATURALLY: An all-natural enzyme such as Serrapeptase, supports a healthy response to inflammation to restore balance.* QUALITY ASSURED & ALLERGEN FRIENDLY: All products by AST Enzymes are manufactured in the USA. Free of wheat, egg, milk, soy, tree nuts, peanuts, fish, shellfish, and sesame.