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The effect of beetroot juice on the plasma concentrations of (a) nitrate and (b) nitrate and the effects of spitting versus swallowing of saliva on plasma concentrations of (c) nitrate, (d) nitrite. Data expressed as mean±SEM. Significance shown as: ANOVA of curve of †††P<0.001 beetroot juice vs. control, †P<0.05 spitting vs. swallowing followed by ‡P<0.001 Bonferroni post test of beetroot juice v control, *P<0.05, **P<0.01 Dunnett’s post test compared to baseline.
