Lactate concentration in rats fed experimental diets (low fibre control diet (CD), starch free wheat bran enriched diet (WB), type III resistant starch enriched diet (RS), and short chain fructo-oligosaccharide enriched diet (FOS)) for 2 (D2) or 44 (D44) days
| CD | WB | RS | FOS | ||
| D2 | |||||
| Caecum | 16.3 (8.4–24.3) | 12.6 (8.7–15.5) | 9.3 (4.5–21.6) | 76.1 (25.6–77.2) | |
| n=5 | n=5 | n=5 | n=5 | ||
| Colon | 5.7 (ND) | 9.4 (3.3–15.6) | 8.0 (5.1–28.3) | 39.1 (33.8–44.8) | |
| n=1 | n=4 | n=3 | n=3 | ||
| D44 | |||||
| Caecum | 11.9 (8.5–28.4) | 21.4 (11.3–28.4) | 11.1 (4.9–20.9) | 22.4 (19.5–34.6) | |
| n=5 | n=5 | n=4 | n=5 | ||
| Colon | 7.1 (ND) | 8.7 (8.2–10.1) | 7.5 (3.2–21.9) | 21.2 (9.6–39.2) | |
| n=1 | n=3 | n=4 | n=4 | ||
Results are expressed as median (min–max) of the sum ofd-lactate and l-lactate concentrations (μmol/g wet content) measured in contents of rats for which a sufficient amount remained after aliquoting for short chain fatty acid and residual starch assays. As concentrations of d- andl-lactate isomers were similar, only total concentrations are indicated.
Statistical analyses (ANOVAs on ranked data followed by Bonferroni's test) were only performed for the caecum, using the model:Y=diet+block. At D2, FOS was significantly different from CD (p =0.017); at D44, the diet effect was not significant.