CardioCare contains key nutrients beneficial to the heart health of your dog. It is now well known that heart function is improved by supplementation of coenzyme Q10.Co-Q10 is a powerful antioxidant that supports the cardiovascular system. Coenzyme Q10 is produced naturally in the body and acts as a powerful antioxidant to help protect against cell damage. Cells that benefit the most from the addition of Co-Q10 are those cells that have rapid turnover, such as the heart, gingival [gums], retina, mucosal cells of the intestines, and immune system cells. Unfortunately, as pets age, they produce less coenzyme Q10 and therefore may benefit from supplementation.