CoQ10, or coenzyme Q10, is an essential nutrient found naturally in our cells’ mitochondria. It helps our cells generate adenosine triphosphate (ATP), their main source of energy. The heart is one of the most metabolically active organs in the body, making CoQ10 an important nutrient for heart health. Our production of CoQ10 decreases as we age but we still require lots of this vital nutrient to maintain a healthy heart and sustained energy.