I've discovered a very heart-healthy and blood pressure lowering amino acid called Citrulline. If you haven't been using it -- get some! Watermelons are chock full of it and it is also in peanuts and almonds (stay away from the salted kind) and many other foods, such as cucumbers and cantaloupe. Apparently (the very bitter) walnut seedlings have the highest concentrations of Citrulline. But you can get watermelon extract from health food stores. Of course, just buying a good powdered Citrulline would be beneficial to anyone. I believe body builders use it and it comes in a protein shake.
When you think about the terrible things that can happen due to high blood pressure, blindness and stroke being two of the worst that I can think of right off the top of my head, it behooves one to do their best to get as many blood pressure lowering items in one's diet if blood pressure is an issue.
And it's nice to know that diet and exercise, like daily walking, can help to lower blood pressure as well.
Be that as it may, I just thought I'd pass along that information, since it's so useful to so many out there.
Some links to information on Citrulline and Arginine:
Take care out there!