McMahon et al. 2017, Nitrate supplementation and exercise performance

Sports Med meta-analysis: nitrate supplementation is ergogenic mainly for time-to-exhaustion tests (ES = 0.33, small-to-moderate), with a trivial non-significant pooled effect across all protocols (ES = −0.10). No percentage-improvement figures are reported. Meta-regression found no statistically significant moderating effect of fitness level. Moderate.