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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
  1. Total SCFA = acetate, propionate, butyrate, isobutyrate, 2-methylbutyrate, isovalerate, lactate, and valerate (if detectable).
  2. Values shown are mean ± standard error, each from 2 samples
  3. *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.