Table 4 Concentration and daily excretion of short-chain fatty acids (SCFA) in faeces

Faecal concentration [μmol/g faeces]

Total SCFA

62.9 ± 23.3^b

75.4 ± 24.0^a

65.3 ± 24.2^b

69.4 ± 23.0

75.0 ± 21.4

72.4 ± 22.6

77.1 ± 21.1

81.3 ± 19.7

75.7 ± 23.5

Acetate

37.3 ± 13.1^b

45.6 ± 12.3^a

41.2 ± 15.9^ab

41.5 ± 12.8

45.9 ± 12.5

45.0 ± 13.6

46.5 ± 12.4

49.6 ± 12.7

46.1 ± 14.4

Propionate

9.86 ± 4.73^b

11.9 ± 5.0^a

9.05 ± 3.89^b

10.7 ± 5.3

11.9 ± 4.6

10.3 ± 4.3

13.2 ± 6.6^ab

15.0 ± 4.9^a

12.2 ± 5.5^b

iso -Butyrate

1.11 ± 0.45

0.97 ± 0.55

0.91 ± 0.49

1.49 ± 0.59^a

1.25 ± 0.51^b

1.15 ± 0.52^b

1.25 ± 0.56^a

1.21 ± 0.63^a

0.95 ± 0.38^b

n -Butyrate

11.4 ± 6.5^ab

14.0 ± 8.4^a

11.3 ± 6.4^b

11.0 ± 5.3

12.3 ± 6.3

11.9 ± 5.4

12.6 ± 5.1

12.1 ± 4.4

13.3 ± 6.3

iso -Valerat

1.76 ± 0.70^a

1.46 ± 0.78^b

1.47 ± 0.79^b

2.14 ± 0.89^a

1.69 ± 0.90^b

1.57 ± 0.77^b

1.70 ± 0.88^a

1.58 ± 1.02^ab

1.28 ± 0.58^b

n -Valerat

1.17 ± 0.57

1.18 ± 0.60

0.98 ± 0.53

1.54 ± 0.72

1.41 ± 0.58

1.40 ± 0.61

1.29 ± 0.73

1.21 ± 0.78

1.14 ± 0.67

n -Caproate ^W

0.26 ± 0.44^b

0.30 ± 0.42^ab

0.39 ± 0.50^a

0.52 ± 0.67^b

0.60 ± 0.57^ab

0.99 ± 1.24^a

0.58 ± 0.74

0.58 ± 0.77

0.66 ± 078

Daily excretion [mmol/d]

Total SCFA

8.89 ± 6.30^b

14.1 ± 9.5^a

12.0 ± 10.0^a

7.68 ± 5.78^b

11.7 ± 9.1^a

10.9 ± 7.2^a

11.0 ± 6.8

12.9 ± 7.1

12.9 ± 6.5

Acetate

5.20 ± 3.53^b

8.57 ± 5.95^a

7.49 ± 6.18^a

4.61 ± 3.49^b

7.09 ± 5.50^a

6.68 ± 4.10^a

6.63 ± 4.23

7.96 ± 4.61

7.86 ± 4.13

Propionate

1.44 ± 1.20^b

2.25 ± 1.61^a

1.75 ± 1.70^b

1.25 ± 1.08^b

1.84 ± 1.47^a

1.61 ± 1.38^ab

1.91 ± 1.47

2.35 ± 1.25

2.11 ± 1.22

iso -Butyrate

0.15 ± 0.08

0.15 ± 0.09

0.13 ± 0.08

0.14 ± 0.07

0.16 ± 0.09

0.16 ± 0.11

0.16 ± 0.09

0.17 ± 0.10

0.16 ± 0.08

n -Butyrate

1.69 ± 1.45^b

2.71 ± 2.35^a

2.24 ± 2.21^a

1.27 ± 1.15^b

2.09 ± 2.01^a

1.89 ± 1.48^a

1.80 ± 1.28^b

1.90 ± 1.24^b

2.28 ± 1.48^a

iso -Valerat

0.22 ± 0.11

0.22 ± 0.12

0.20 ± 0.10

0.20 ± 0.10

0.21 ± 0.12

0.21 ± 0.13

0.21 ± 0.12

0.21 ± 0.11

0.21 ± 0.10

n -Valerat

0.16 ± 0.13

0.19 ± 0.13

0.16 ± 0.13

0.16 ± 0.10

0.19 ± 0.11

0.20 ± 0.15

0.18 ± 0.13

0.18 ± 0.14

0.19 ± 0.13

n -Caproate ^W

0.04 ± 0.08^b

0.04 ± 0.06^ab

0.05 ± 0.09^a

0.05 ± 0.07^b

0.08 ± 0.10^ab

0.15 ± 0.22^a

0.08 ± 0.11^b

0.09 ± 0.13^ab

0.11 ± 0.15^a