Illinois researchers studying the effect of nutritional supplementation with essential fatty acids (EFAs) reported that EFAs are absorbed systemically after oral administration and alter the normal pool of fatty acids in the bloodstream of horses.Administration of EFAs, including the omega-3 fatty acids eicosapentaenoic acid (EPA) and docohexaenoic acid (DHA)–the two acids most commonly found in EFA supplements–is known to have beneficial health effects in humans, particularly influencing blood pressure and heart disease.