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. 2018 Feb 27;58(3):1095–1111. doi: 10.1007/s00394-018-1625-1

Fig. 2.

Fig. 2

24-hour urinary phenolic acid profile excretion (µmol/day) after low and high-polyphenol diets in younger (n = 8) and older (n = 13) participants. Each circle indicates the measurement of the urinary phenolic acids profile for each participant after low and high-polyphenol diets. Median urinary phenolic acids for each group are indicated by a red horizontal line. a, b symbols indicate differences within group (LPD to HPD; younger: p = 0.0009; older: p = 0.0002). §Symbol indicates differences between groups (HPD vs. HPD; p = 0.04)