A small study in London showed that drinking a cup of beetroot juice significantly lowered blood pressure in hypertensive patients within six hours. After 24 hours, their blood pressure remained lower than those in the control group. The benefits come from inorganic nitrate (NO3) found in beets and leafy vegetables. The body converts NO3 to inorganic nitrite (NO2), then is broken down to nitric oxide (NO), resulting in vasodilation. The nitrite had little effect on the blood pressure of healthy study participants. Patients with renal failure should avoid beet juice. Providing nitrite could be an affordable, safe, and effective option for hypertensive patients to achieve their target blood pressure.
Bordenave MD, Jorge. “Beet Juice Beats Hypertension.” Articles. DrBordenave.com. Web. 24 Jun 2015.