Table 3 Total SCFA†, acetate, propionate, and butyrate production‡ (μmol/ml) of isolated oat β-glucan (54% soluble fiber), guar gum sample (MW 400 kDa) and inulin sample (degree of polymerization 100% ≈10) after 0, 4,8,12, and 24 hours in a model intestinal fermentation, analyzed by gas chromatography.
From: Concentrated oat β-glucan, a fermentable fiber, lowers serum cholesterol in hypercholesterolemic adults in a randomized controlled trial
Sample | Oat β-glucan | Guar Gum | Inulin |
---|
Total SCFA | 0 h | 0.6 ± 0.2 | -0.7 ± 0.5 | -0.3 ± 0.2 |
| 4 h | 32.7 ± 0.3a* | 7.7 ± 0.02b
| 33.8 ± 0.8a
|
| 8 h | 50.5 ± 4.0a
| 45.7 ± 3.2a
| 75.4 ± 0.7b
|
| 12 h | 50.3 ± 6.2 | 62.0 ± 0.6 | 55.6 ± 1.8 |
| 24 h | 48.7 ± 1.5a
| 68.6 ± 0.8b
| 51.8 ± 0.8a
|
Acetate | 0 h | -0.4 ± 0.01 | -0.2 ± 0.05 | -0.2 ± 0.02 |
| 4 h | 23.1 ± 0.9a
| 6.6 ± 0.5b
| 23.3 ± 0.4a
|
| 8 h | 40.0 ± 3.1a
| 34.2 ± 2.2a
| 63.7 ± 1.8b
|
| 12 h | 37.5 ± 4.5 | 45.5 ± 0.1 | 48.2 ± 4.2 |
| 24 h | 24.7 ± 1.7a
| 34.6 ± 0.2b
| 30.3 ± 0.8ab
|
Propionate | 0 h | -0.1 ± 0.01 | 0.05 ± 0.04 | -0.04 ± 0.01 |
| 4 h | 0.7 ± 0.04 | 0.5 ± 0.1 | 0.4 ± 0.1 |
| 8 h | 0.8 ± 0.7a
| 4.5 ± 0.8b
| -2.2 ± 0.1a
|
| 12 h | 3.8 ± 1.2a
| 16.8 ± 0.3b
| -6.2 ± 0.2c
|
| 24 h | 11.9 ± 0.004a
| 28.5 ± 0.7b
| 0.08 ± 0.1c
|
Butyrate | 0 h | -0.1 ± 0.02 | -0.03 ± 0.04 | -0.03 ± 0.02 |
| 4 h | 0.4 ± 0.02 | 0.2 ± 0.05 | 0.2 ± 0.04 |
| 8 h | 2.2 ± 0.3a
| 0.9 ± 0.2b
| 0.6 ± 0.05b
|
| 12 h | 7.7 ± 0.9a
| 3.3 ± 0.1b
| -.004 ± 0.1c
|
| 24 h | 13.3 ± 0.3a
| 6.8 ± 0.1b
| 23.1 ± 0.1c
|
-
† Total SCFA = acetate, propionate, butyrate, isobutyrate, 2-methylbutyrate, isovalerate, lactate, and valerate (if detectable).
-
‡Values shown are mean ± standard error, each from 2 samples
- *Mean production of each compound was compared at each time point between oat β-glucan, guar gum, and inulin. Within each row, means that do not share a superscript letter are significantly different (p < 0.05), and means that share a letter are not significantly different.