The highest amount of CoQ10 is found in the heart, kidneys, and liver. The amount of CoQ10 in the body decreases with age, stress, and through poor diet, necessitating supplementation. Using CoQ10 as a high blood pressure treatment also requires extra doses through supplements. So how exactly does CoQ10 improve your body's ability to cope with modern life, and lower high blood pressure?
CoQ10 helps widen arteries

A number of studies suggest that CoQ10 is an effective high blood pressure treatment by widening the brachial arteries. This increases the flow of blood by up to 38% and so lowering blood pressure. CoQ10 supplementation also helps in the treatment of hypertension(http://www.mitamins.com/disease/High-Blood-Pressure.html) by inhibiting inflammation of the arteries, which would otherwise constrict blood flow and increase pressure.
CoQ10 is a super antioxidant

A randomized, double-blind, controlled trial suggested a role for CoQ10 in the high blood pressure treatment removing cholesterol(http://www.mitamins.com/disease/High-Cholesteol.html), a major cause of high blood pressure, from the blood vessels. CoQ10 is involved in the oxidation of cholesterol and the lowering of levels in the blood.
CoQ10 strengthens the heart

CoQ10 also protects the cells from free radical damage and strengthens the muscles, including the heart muscle, making it better cope with hypertension. If the heart has less strain on it then it is less likely to develop disease and the risk of heart attack is also reduced.

Research clearly shows that CoQ10 lowers blood pressure, and is an effective treatment for people with mild hypertension. Improvements in the condition of the patient were seen in 6-8 weeks. However it is still not completely clear that CoQ10 deficiency can cause high blood pressure in the first place. Therefore, even with a ?normal? amount of CoQ10 in the body, extra supplements can help in high blood pressure treatment(http://www.mitamins.com/disease/High-Blood-Pressure.html). It's certainly less of a lifestyle change than giving up your job, and cheaper than air tickets to Tibet.