Figure 3
From: Nitrate as a potential prebiotic for the oral microbiome
Salivary acidification is inhibited by nitrate. Saliva of 9 donors was incubated for 5 h with 0.2% glucose and a given concentration of nitrate (0.5–8.5 mM), which is within the physiological range of human saliva. In this plot, averages (black dots) with standard deviations, upper quartiles (green line) and lower quartiles (red line) are shown. All the different concentrations of nitrate were compared with 0 mM nitrate and significance was marked with * for p < 0.05 and ** for p < 0.01 according to a Wilcoxon test.
