It is postulated that CoQ10 protects the mitochondria from attack by the hydroxyl radical and that this attack is the ultimate source of aging. See also Mitotone. CoQ10 protects against dopamine depletion in the brain. Dopamine depletion is the source of Parkinson's disease. CoQ10 also regenerates Vitamin E , in effect, reloading it so it can be used again and again.
Benefits seem to increase with dose.
DOSE People over 40 years of age should take at least 30 mg a day if they are healthy. Anyone with a serious illness should take 100 mg daily or more. Cancer patients should take 400 mg per day. Once taken it should not be stopped. Patients improve as long as they take it but the problem can come back once it is discontinued.