Fig. 3: Effect of dietary fiber on cecal levels of SCFAs and branched-chain fatty acids.

Cecal levels of acetate (a), propionate (b), butyrate (c), total SCFAs (sum of acetate, propionate, and butyrate) (d), isobutyrate (e) and isovalerate (f). Concentrations are expressed per gram of cecal content wet weight. Box and whisker plots denote the interquartile range, median, and spread of points within 1.5 times the interquartile range along with individual data points. Comparisons of means between diets within each donor group (n = 7–10/diet/donor group) were conducted using a Wilcoxon test, *P < 0.05, **P < 0.01, ***P < 0.001.