Dietary Supplement A Natural Biochemical for Cellular Energy Production in the Heart 21st Century...for a Healthier Future CoEnzyme Q10 is a powerful antioxidant that is a necessary nutrient for cell function in the body and has been shown to promote cardiovascular health. Taking higher dosages of CoEnzyme Q10 has been the subject of recent studies in its relationship with neurological health. 21st Century's CoEnzyme Q10 400 mg is a convenient higher-dosage formula for your good health.21st Century