No effect of nitrate-rich beetroot juice on microvascular function and blood pressure in younger and older individuals: a randomised, placebo-controlled double-blind pilot study.

Background/objectives: To compare the effects of supplemental inorganic nitrate (NO) on microvascular endothelial function and blood pressure in younger vs. older participants.

Subjects/methods: 25 individuals participated in a double-blind, randomised, placebo-controlled crossover pilot study.