FIGURE 2.

Supplementation periods (A) and supplementation period activities (B). The study consisted of 3 supplementation periods for each participant, and a high (1.5 g), medium (0.25 g), or low (0.03 g) condensed tannin supplement was provided for 4 wk. There were 2- to 3-wk washout periods between supplementation periods, which aimed to stabilize salivary protein and iron biomarkers. Supplementation periods consisted of week 0 and week 4 meal challenges, salivary collection, and astringency testing. At the midpoint of each supplementation period, three 24-h dietary recalls (2 weekday and 1 weekend day) were collected from each participant.