Serrapeptase is a proteolytic enzyme isolated from the non-pathogenic Serratia bacteria species found in the digestive tract of the Japanese silkworm. Serrapeptase has been used as a nutritional supplement in Europe and Asia for over three decades. Each capsule of Best Serrapeptase contains pure serrapeptase designed for optimal absorption in the intestinal tract. visit us http://www.tasmanhealth.co.nz/doctors-best-serrape ptase/ for more details!!