I had high blood pressure for many years. I was on several different meds and the best they could get my bp was 140/80. I also had fatty liver disease and prone to gout. They say bp is controlled by the kidneys.
Anyway, I went from 250 to 220 with typical dieting that left me starved and feeling bad--no change in bp. I went from 220 to 165 with PB over a year, and within the first 4-6 months my bp had gone down and I was off the meds. Now 2 years later, it is typically in the 115/65 or so. I took no supplements or did anything to target lowering bp other than eat right and exercise.