Dietary nitrate does not acutely enhance skeletal muscle blood flow and vasodilation in the lower limbs of older adults during single-limb exercise.

The key findings of this study are that despite increasing plasma [NO3-] and [NO2-], acute dietary NO3- intake had no effect on (1) rapid hyperaemic or vasodilator responses at the onset of exercise; (2) hyperaemic and vasodilator responses during steady-state submaximal exercise; or (3) kinetics of vasodilation preceding steady-state responses. Collectively, these findings suggest that low dose dietary NO3- supplementation does not improve hyperaemic and vasodilator responses across an exercise transient in older adults.