16. Swiss chard
After spinach, another leafy green you can consider is Swiss chard. It also contains plenty of potassium and even more magnesium. Both nutrients help you regulate your blood pressure. Magnesium, in particular, is excellent in this job. It acts in cell proteins known as calcium channel blockers. These proteins are essential to regulate calcium movement in and out of cells, inducing contraction in the blood vessels. That is how Swiss chard and other sources of magnesium improve blood pressure levels.