The powerful antioxidant is especially important during viral infections since CoQ10 levels in white blood cells fall rapidly as the cell's requirements for this super-immune nutrient increase in order to fight off invaders. CoQ10 stimulates the immune system to kill bacteria and increase antibody response. It also maximizes the eating and digesting ability of macrophages, allowing them to destroy bacteria, viruses and parasites effectively. Serum IgG levels have also been shown to increase with very small doses (60 mg) of CoQ10. It is also known to enhance natural killer cell activity and inhibit metastasis of tumors.

Most important for Chronic-Fatigue-Syndrome sufferers is CoQ10's ability to increase adenosine triphosphate (ATP) production. ATP is needed to provide sufficient energy to the body.
Without adequate ATP, we feel tired and experience muscle weakness and impaired immunity. Cells of the immune system, muscles and heart have a high affinity for CoQ10, and when supplies are inadequate, disease states settle in.

A dosage of 320 mg per day of CoQ10 should be supplemented to ensure that appropriate levels are available to immune cells during infection. CoQ10 is one of the safest nutrients available, but if you are currently taking digitalis, beta-blockers or ACE inhibitors, your prescription drug dose will need to be lowered once you start it