Fig. 1. Individual and mean (±SE) differences in fecal bulk from the low-fiber control for the coarse and fine wheat brans on both the metabolic (n=23) and ad libitum (n=24) studies. Compared with the low-fiber control, the fine and medium particle size wheat brans increased mean daily fecal output in the metabolic study (58±21 g/d, p=0.012 and 68±25 g/d, p=0.011, respectively), and a similar increase was seen with the medium and coarse wheat brans in the ad libitum study (45±14 g/d, p=0.003 and 41±12 g/d p=0.002, respectively).