*Preventing blood vessel complications caused by heart bypass surgery. There is some evidence that taking coenzyme Q-10 by mouth for a week before surgery might help to reduce blood vessel damage. But not all research agrees with this finding.
*High blood pressure (hypertension). Taking coenzyme Q-10 by itself or along with other medications for treating high blood pressure seems to help lower blood pressure even more.
*Preventing migraine headache. Taking coenzyme Q-10 by mouth seems to help prevent migraine headaches. Studies show it can decrease the frequency of headaches by about 30% and the number of days with headache-related nausea by about 45% in adults. Taking coenzyme Q-10 also appears to reduce migraine frequency in children who have low levels of coenzyme Q-10. It can take up to 3 months for significant benefit. Unfortunately, coenzyme Q-10 doesn’t seem to be effective in treating migraines, once they have developed.
*Parkinson’s disease. Some research shows that taking coenzyme Q-10 supplements might slow decline in people with early Parkinson’s disease. But taking a coenzyme Q-10 supplement in people with mid-stage Parkinson’s disease does not seem to improve symptoms.
*Improving the immune system of people with HIV/AIDS.