Dietary Nitrate Supplementation and Exercise Performance: An Umbrella Review of 20 Published Systematic Reviews with Meta-analyses.

Background: Dietary nitrate (NO) supplementation is purported to benefit exercise performance. However, previous studies have evaluated this nutritional strategy with various performance outcomes, exercise tasks, and dosing regimens, often yielding inconsistent results that limit the generalizability of the findings.

Objective: We aimed to synthesize the available evidence regarding the effect of NO supplementation on 11 domains of exercise performance.