lowering calories by 10% usually always works and might be worth a try. I know people that was on medication for over a decade and blood pressure was still quite high, by reducing calories, blood pressure went down even more than medication could achieve.

and a good well designed multi could also be of benifit. This is one of the best you will find http://www.relentlessimprovement.co.../ortho-core.htm

also take a look at this page and click on each food for information and references on its possible benifits.
http://www.whfoods.com/foodstoc.php