Fecal samples collected after GPE treatment contain high levels of antioxidant activity.

Antioxidant activity (Trolox equivalents) in murine fecal samples (n = 6 mice) collected before (0 h) a single oral dose of GPE (32 mg total polyphenols/ kg) and A. every hour for 12 h after treatment while mice had ad libitum access to chow diet or B. every hour during a 12 h period of food restriction, after which chow diet was replaced and an additional fecal sample was collected at 24 h. C. Total polyphenols (as gallic acid equivalents, left) and total antioxidant capacity (as Trolox equivalents, right) in fecal samples collected before gavage (0 h, black bars) and in total feces collected over the 24 h period following oral GPE administration (crosshatched bars), as compared to the initial dose (white bars). N = 6 mice; Data are reported as mean ± SD.