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Fractional and 24-h urine parameters after the consumption of fruit tea (control day, blue line) and black tea (test day, red line); data are represented as M ± SEM. (a) Urinary oxalate excretion; (b) urinary citrate excretion; (c) relative supersaturation of calcium oxalate; (d) relative supersaturation of uric acid. Abbreviation: RS, relative supersaturation. * Wilcoxon test within groups: <0.05.
