Other studies have shown it is quickly depleted as blood pressure rises. It is a good idea to take supplements when under stress. Like chromium, this is effective in maintaining blood sugar levels thus fighting insulin resistance and heart disease. In a study in the Netherlands, magnesium supplements were found to lower blood pressure in women who were experiencing menopause provided they were not on other medication at the time.
Chelated magnesium is preferred.
Requirements are 500 mg per day.