Use: Congestive heart failure or weak heart. CoQ10 is an antioxidant made by the body that helps vitamins C and E to detoxify superoxide anion. CoQ10 also reduces the oxidation of cholesterol in the blood vessel wall. CoQ10 is widely used in Europe and Japan. The best data to support its use come from clinical trials in patients with heart failure. In these individuals, CoQ10 improves shortness of breath and reduces hospitalizations. (Several medications reduce levels of CoQ10, notably the stains or cholesterol-lowering medications. Some nutritionists add CoQ10 to the regimen of patients taking stains). However, there is no evidence that CoQ10 prevents heart attack or stroke.

Side Effects: Occasionally causes stomach upset.

Doses: 30 - 150 milligrams daily