Some foods can help get health issues, like high blood pressure, under control.  Beets are a natural source of nitrates.  Plant-based nitrates help relax blood vessels which makes blood flow more easily and lowers blood pressure.  Studies do show that you need to consume at least 8 oz a day to really have beet juice be effective.   I'm not a big fan of beet juice so I have to drink it in small doses.  You can also help reduce blood pressure by eating foods high in potassium and magnesium.  A nice sweet potato or banana would be great addition to your daily diet.  Don't ruin the benefits of these foods by consuming high sodium meals or drinking lots of alcohol.  Here's a nice juice recipe that you can make that combines the benefits of nitrates and potassium in one tasty glass.  

beet the high blood pressure juice

1/2 inch ginger root
1/2 beet
1 small sweet potato
2 oranges
2 granny smith apples

Start juicing the ingredients in the order that they are listed.   You could also make this a smoothie by blending it with ice.  The benefit of the smoothie is the fiber which is also good for high blood pressure.