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Table 3. Effects of dietary grape seed proanthocyanidins on concentration of volatile fatty acids in the ileal (A) and colonic (B) digesta of piglets' samples¹,².

Variable	NC	GSPs	AGS	PC
Ileum
Acetic acid, mg/g	1.09 ± 0.11^a	1.06 ± 0.09^a	0.99 ± 0.08^a	0.68 ± 0.12^b
Propionic acid, mg/g	0.125 ± 0.005^b	0.171 ± 0.004^a	0.136 ± 0.007^b	0.102 ± 0.006^c
Butyric acid, mg/g	0.124 ± 0.007^b	0.183 ± 0.009^a	0.134 ± 0.006^b	0.130 ± 0.006^b
Valeric acid, mg/g	0.048 ± 0.009	0.055 ± 0.010	0.050 ± 0.008	0.049 ± 0.004
Isobutyric acid, mg/g	0.018 ± 0.006	0.023 ± 0.004	0.020 ± 0.007	0.020 ± 0.008
Isovaleric acid, mg/g	0.066 ± 0.008	0.070 ± 0.004	0.064 ± 0.009	0.068 ± 0.003
Colon
Acetic acid, mg/g	3.24 ± 0.20	3.08 ± 0.15	3.11 ± 0.14	2.99 ± 0.14
Propionic acid, mg/g	1.20 ± 0.10^c	1.91 ± 0.09^a	1.54 ± 0.06^b	0.97 ± 0.07^d
Butyric acid, mg/g	0.568 ± 0.09^b	0.746 ± 0.06^a	0.665 ± 0.07^ab	0.489 ± 0.05^b
Valeric acid, mg/g	0.218 ± 0.006^a	0.209 ± 0.006^a	0.224 ± 0.005^a	0.126 ± 0.008^b
Isobutyric acid, mg/g	0.120 ± 0.007	0.132 ± 0.004	0.117 ± 0.008	0.114 ± 0.005
Isovaleric acid, mg/g	0.103 ± 0.003^a	0.119 ± 0.007^a	0.114 ± 0.006^a	0.065 ± 0.005^b

Values are means ± SEMs, n = 6. Different superscript within a row means significantly different (P < 0.05).

NC, negative control; GSPs, grape seed proanthocyanidins; AGS, reduced antibiotics + GSPs; PC, positive control.

Table 3. Effects of dietary grape seed proanthocyanidins on concentration of volatile fatty acids in the ileal (A) and colonic (B) digesta of piglets' samples1,2.