Serrapeptase is a highly proteolytic (digestive protein) enzyme that was originally discovered in the intestines of a Japanese silkworm species. After years of studies, it became clear that this unique enzyme may have a huge potential that lies in its beneficial effects on the health of the joints, circulatory support, respiratory function and immune defence. Swanson Optimum Potency Serrazimes is identifiable as an innovative source of serapeptase, suitable for vegetarians, which is cultivated in a totally natural way. It is developed by the experts working in the National Enzyme Company. The activity of serapeptase is measured in serapeptase units. Our formula provides the potent 40,000 units in each capsule.