Both polyphenols and monounsaturated fat keep LDL cholesterol from becoming oxidised and building up plaque deposits in the arteries.It is easier to regulate high blood pressure once cholesterol and heart disease risk are under control.
Some high blood pressure or hypertensive patients found that eating a low fat diet while using olive oil reduced their need for blood pressure medications by half. As little as 40 grams of olive oil a day or 4 tbsp. was all it took.
Always consult your doctor before changing the amount of any medications that you are taking.