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Table 3 Concentrations of volatile fatty acids (VFA) and pH value in faeces samples of weaned pigs fed a control diet or a diet supplemented with 1% grape seed and grape marc meal extract (GSGME) or 1% spent hops (SH)

From: Effects of dietary polyphenol-rich plant products from grape or hop on pro-inflammatory gene expression in the intestine, nutrient digestibility and faecal microbiota of weaned pigs

  Control GSGME SH
VFA (μmol/g digesta)
Total VFA 581 ± 111 497 ± 90* 524 ± 41#
Acetic acid 332 ± 75 282 ± 64# 310 ± 31
Propionic acid 141 ± 33 115 ± 21* 120 ± 16#
Isobutyric acid 10.4 ± 2.5 10.6 ± 2.3 11.8 ± 2.3
Butyric acid 66.1 ± 9.6 61.9 ± 18.5 53.5 ± 13.0*
Isovaleric acid 12.9 ± 3.3 13.2 ± 3.9 13.5 ± 2.2
Valeric acid 17.7 ± 4.4 14.2 ± 3.7# 14.8 ± 3.8#
Faecal pH value 5.9 ± 0.1 6.2 ± 0.2* 6.2 ± 0.3*
  1. Results are shown as mean ± SD (n = 16/group). *Significantly different from control (P < 0.05). #Tended to differ from control (0.05 ≤ P ≤ 0.10).