For a long time Co Q10 has been used as an antioxidant. Now, a study from Italy suggests that Co Q10 supplementation may improve cardiac functioning in heart failure patients. In the study, 23 patients with heart failure were evaluated over four weeks time with and without supplements. Co Q10, independently and with exercise, significantly improved exercise capacity and heart function. Also, supplements were tolerated very well. Ask your provider about these supplements if you have heart failure.? Bharat Magu, M.D. works at the Elizabethtown Community Health Center & Westport Health Center.