superfoods Beet juice powder WebMD: The Truth About Beet Juice high concentration of nitrates The truth about beet juice Zelman, MPH, RD, LD WebMD lower blood pressure. WebMD help your blood vessels produce Nitric Oxide Kathleen M. lower blood pressure. help your blood vessels produce Nitric Oxide WebMD WebMD Beets Studies show Red Beet Juice antioxidants and nitric oxide help your blood vessels produce Nitric Oxide WebMD: The Truth About Beet Juice lower blood pressure.