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Exercising regularly for 30 minutes a day can also lower your blood pressure as it stimulates a substance in our bodies called nitric oxide. Nitric oxide helps to keep our blood vessels open. During the early stages of arteriosclerosis (or plaque build-up), one of the first things to be seen is a reduction in the amount of nitric oxide in the blood vessels. When you exercise, the accelerated pumping of the heart forces more blood to flow through the vessels. As this blood pushes its way along the lining of the vessels, more nitric oxide is released.
The amino acid L Argine yes does lower blood pressure because it has nitric oxide in it. I tried it for 4 months - drank 6 gr a day in divided doses. It didn't do nuthin for me. I just recently quit. But it may work for someone else. I am older, so may take time to clear out my arteries. I am now trying Apple Cider Vinegar and vit k 2 to clean out the arteries.