Cinnamon and magnesium are two nutrients that have been shown to have a positive effect on blood pressure. Cinnamon has been shown to help lower both systolic and diastolic blood pressure, while magnesium has been shown to help lower systolic blood pressure. While these two nutrients can have a positive effect on blood pressure, it's important to remember that they should not be used as a replacement for traditional medical treatment for high blood pressure. If you are interested in using cinnamon or magnesium to help lower your blood pressure, talk to your doctor first to make sure it's safe for you.