Calcium supplements are a good idea for postmenopausal women, but we strongly suggest that you get some calcium and all your potassium and magnesium from foods, which also contain other nutrients you need. Nonfat or low-fat dairy products are the best sources of calcium, though some leafy greens are good, too. Potassium is plentiful in most foods. Magnesium is plentiful in whole grains, leafy greens, meats, milk, beans, bananas, and nuts. If you're on hypertensive medication, your doctor may recommend potassium supplements.
Moderate doses have no effect on blood pressure.
But caffeine is not known to cause hypertension. This version of the DASH diet is adapted from the Sixth Report of the Joint National Committee. It is rich in fruits, vegetables, and low-fat or nonfat dairy products, low in total fat and cholesterol, and high in fiber. It supplies beneficial amounts of potassium, calcium, and magnesium. The plan is based on 2,000 calories a day.