Hypertension is abnormally high blood pressure, usually defined as adult systolic blood pressure above 140 mm Hg or adult diastolic blood pressure above 90 mm Hg. Systolic blood pressure is blood pressure measured during the contracting (pumping) of the left ventricle of the heart. Diastolic blood pressure is blood pressure measured during the relaxation of the left ventricle.
A meta-analysis of studies of Coenzyme Q10 supplementation for hypertension has shown that Coenzyme Q10 supplementation reduces high blood pressure moderately but significantly.