Promote cardiovascular wellness with Swanson CoQ10! CoQ10 is fast becoming one of the world's most popular dietary supplements, but many people still don't know much about it. Produced in small amounts within the body, CoQ10 (coenzyme Q10) is a vitamin-like nutrient involved in the production of ATP (adenosine triphosphate) the primary source of cellular energy for use throughout the body. Our capsules are a great way to augment your body's natural production of this important nutrient.