Method: Fifteen women and fifteen men participated in a double-blind, randomized, placebo-controlled, crossover
study. Volunteers were randomized to receive 500 g of beetroot and apple juice (BJ) or a placebo juice (PL).
Volunteers had BP measured at baseline and at least hourly for 24-h following juice consumption using an
ambulatory blood pressure monitor (ABPM). Volunteers remained at the clinic for 1-h before resuming normal
non-strenuous daily activities. The identical procedure was repeated 2-wk later with the drink (BJ or PL) not
consumed on the first visit.