EPO Equine was scientifically engineered to naturally stimulate the production of EPO (erythropoietin). EPO increases red blood cell levels and blood volume resulting in increased blood carrying capacity. When this happens your horse will be able to run at a faster pace for a longer period of time. The ingredients in the patent-pending formula address the four major limitations on red blood cell production; namely, EPO levels, red blood cell nutrients, iron availability, and inflammation.