Serrapeptase is a proteolytic enzyme isolated from the non-pathogenic bacteria Serratia species found in the digestive tract of the Japanese silkworm. The enzyme is used by the worms to digest their cocoons. Serrapeptase has been used as a nutritional supplement in Europe and Asia for nearly three decades. Each vegetarian capsule of Best Serrapeptase contains enteric-coated, acid stable granules of pure serrapeptase designed for optimal absorption in the intestinal tract. Supplement Facts Serving Size 1 cap Servings per container 90 Amount Per Serving Serrapeptase enteric coated capsule 40,000 Units Other Ingredients: Vegetarian capsule cellulose, water, enteric coating HPMCP. Directions: Take 1 to 3 capsules daily away from food.