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Table 4 Large intestinal tissue weights and fermentation parameters of obesity-prone and obesity-resistant rats consuming diets with different levels of resistant starch for 4 wk 1

From: Dietary resistant starch dose-dependently reduces adiposity in obesity-prone and obesity-resistant male rats

  Resistant starch, % of diet weight Main Effects (P-value)
  0% 4% 8% 12% 16% RS Phenotype RS x Phenotype
Caecum         
 Digesta weight, g         0.015
 Obesity-prone 1.7 ± 0.2 a 2.3 ± 0.3 a 6.4 ± 1.0 b 6.9 ± 1.0 b 11.5 ± 1.6 c    
 Obesity-resistant 1.5 ± 0.1 a 2.5 ± 0.5 ab 6.0 ± 0.7 b 9.5 ± 0.9 c 7.4 ± 1.3 bc    
 Total SCFA pool, mmol 169 ± 11 a 288 ± 43 ab 657 ± 83 bc 985 ± 150 c 1029 ± 150 c 0.0001 ns ns
 Digesta pH 7.2 ± 0.1 c 6.8 ± 0.1 b 6.2 ± 0.1 a 6.0 ± 0.1 a 5.9 ± 0.1 a 0.0001 ns ns
Colon         
 Digesta weight, g 1.0 ± 0.1 a 1.9 ± 0.1 b 2.1 ± 0.2 bc 3.0 ± 0.2 d 3.2 ± 0.3 d 0.0001 ns ns
 Total SCFA pool, mmol 69 ± 7 a 160 ± 14 b 184 ± 26 b 213 ± 20 b 215 ± 23 b 0.0001 0.0163 ns
 Digesta pH 7.3 ± 0.1 c 6.3 ± 0.1 b 6.0 ± 0.1 ab 6.0 ± 0.1 ab 5.8 ± 0.1 a 0.0001 ns ns
Faeces         
Faecal output g/d 1.7 ± 0.1 a 3.0 ± 0.2 ab 3.7 ± 0.3 b 5.8 ± 0.6 c 8.3 ± 0.5 d 0.0001 0.0284 ns
Faecal fat2, g/d 0.15 ± 0.02 0.09 ± 0.01 0.11 ± 0.02 0.09 ± 0.01 0.13 ± 0.01 ns ns ns
  1. 1 Values are means ± SEM. Labelled means without a common letter differ, P < 0.05. ns = not significant, P > 0.05. All dietary treatments consist of n=8 obesity-prone and n=12 obesity-resistant rats.
  2. 2n=8 (n=4 obesity-prone and n=4 obesity-resistant rats per group).
  3. 3 obesity-prone 188 ± 11 mmol, obesity-resistant 149 ± 11 mmol.
  4. 4 obesity-prone 4.9 ± 0.5 g/d, obesity-resistant 4.3 ± 0.2.