Flavonoid-rich apples and nitrate-rich spinach augment nitric oxide status and improve endothelial function in healthy men and women: a randomized controlled trial

► Flavonoids and nitrates can augment nitric oxide status via distinct pathways ► We investigate acute effects of flavonoid-rich apples and nitrate-rich spinach ► We employ a randomised controlled, crossover trial including healthy men and women ► Apples and spinach enhance nitric oxide status and improve endothelial function