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Dietary nitrate in the form of daily beetroot juice significantly reduced elevated blood pressure compared with placebo in hypertensive patients over 4 weeks, a randomized phase 2 trial showed.

Dr Vikas Kapil (Barts and the London School of Medicine and Dentistry, London, UK) and colleagues observed significant reductions in systolic and diastolic BP as measured in the clinic, at home, or by ambulatory blood pressure monitoring (ABPM) among patients who who drank 250 mL of the juice daily, for a nitrate dosage of approximately 6.4 mmol/day. The same amount of nitrate-depleted beetroot juice served as the placebo.

Kapil V, Khambata RS, Robertson A, et al. Dietary nitrate provides sustained blood pressure lowering in hypertensive patients: A randomized, phase 2, double-blind, placebo-controlled study. Hypertension 2014; DOI: 10.1161/HYPERTENSIONAHA.114.04675. Abstract