Fig. 1. Percentage reduction in voluntary energy intake in studies examining the effects of high vs. low fiber diets. Values are means of treatment groups for studies >2 days duration with control group values set to 100. In a paired t test analysis of the group means from individual studies, treatments averaged 90% of controls and were significantly different (p = 0.003). Reprinted with permission from Howarth et al. [21].
Fig. 2. Rate of weight loss in control and higher fiber treatments. Values are the means of treatment means from ad libitum studies. Differences between the treatments were significantly different by paired t test (p = 0.003). Reprinted with permission from Howarth et al. [21].
Fig. 3. Summary of data from cross-over studies examining the effects of the glycemic index of test meals or preloads on subsequent energy intake. Spitzer and Rodin [34], Rodin [35], Guss et al. [36], Holt and Miller [37], Ludwig et al. [25]. Reprinted with permission from [22].