ESA erythropoietin is a hormone with many different uses as it helps our bodies increase the production of enzymes that are responsible for protecting the tissue from injury, enhances memory and learning capabilities, enables the development of the heart and the central nervous system, enhances the overall effectiveness of cancer treatments, stimulates hematopoiesis and erythropoiesis, minimize blood transfusion among patients who are critically ill.  This makes ESA erythropoietin very important for our bodies.