| aVFA, ppm | 2012 | 2007 | dSEM | |
|---|---|---|---|---|
| Acetic acid | 483 | 443 | 14.34 | 0.17 |
| Propionic acid | 170 | 163 | 5.52 | 0.71 |
| Butyric acid | 83 | 81 | 3.12 | 0.08 |
| Valeric acid | 23 | 21 | 0.71 | 0.56 |
| Iso-butyric acid | 22 | 21 | 1.08 | 0.47 |
| Iso-valeric acid | 39 | 36 | 2.18 | 0.24 |
| bSCFA | 759 | 708 | 22.46 | 0.02 |
| cBCFA | 62 | 57 | 3.27 | 0.50 |