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. 2019 May 8;20(9):2277. doi: 10.3390/ijms20092277

Figure 2.

Figure 2

Average values for creatinine corrected ATNC levels in urine (nmol/mmol) for the intervention groups stratified for vitamin C supplementation, at baseline (day 1), after consumption of 1 bottle (day 2) and 7 bottles (1 daily, day 8) of beetroot juice. Error bars indicate standard error. (a) p < 0.05; significant increase at day 8 compared to day 2 in the BRJ group (Wilcoxon signed rank test); (b) p < 0.01: significant increase at day 2 compared with baseline levels (day 1) in the BRJ group (Wilcoxon signed rank test); (c) p < 0.001; significant increase at day 8 compared to baseline levels (day 1) in the BRJ group (Wilcoxon signed rank test); (d) p < 0.01, significantly higher levels in the BRJ group compared to the BRJ + vit C group (Mann–Whitney test) at day 2; and (e) p < 0.01, significantly increased levels at day 8 in the BRJ + vit C group compared to baseline levels (day 1) and day 2 (Wilcoxon signed rank test).