Table 2.
Average amounts of SCFAs in biological samples, and their intra- and inter-day reproducibilities. ND represents “not detected”. (n = 3 for intra- or inter-day reproducibility).
| Mouse Feces (nmol/mg) | Mouse plasma (μM) | Human EBC (μM) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Average | Intraday | Interday | Average | Intraday | Interday | Average | Intraday | Interday | |
| RSD (%) | RSD (%) | RSD (%) | RSD (%) | RSD (%) | RSD (%) | ||||
| Acetic acid | 19.5 | 3.25 | 8.04 | 77.4 | 1.61 | 8.03 | 66.4 | 1.27 | 6.02 |
| Propionic acid | 3.54 | 0.866 | 2.88 | 8.08 | 3.1 | 2.27 | 13.4 | 1.17 | 2.41 |
| Isobutyric acid | 0.802 | 4.87 | 9.23 | 31.1 | 7.37 | 9.74 | 2.43 | 5.2 | 6.15 |
| Butyric acid | 0.0934 | 8.13 | 11.2 | 20.7 | 5.46 | 8.98 | 2.79 | 6.01 | 2.28 |
| 2,2-Dimethylpropionic acid | ND | - | - | 35.9 | 5.17 | 9.73 | ND | - | - |
| 2-Methylbutyric acid | 0.645 | 1.12 | 10 | 14.3 | 6.54 | 12.5 | ND | - | - |
| Isovaleric acid | 0.379 | 1.29 | 8.84 | 9.92 | 6.95 | 18 | ND | - | - |
| Valeric acid | 0.224 | 1.64 | 4.53 | 6.16 | 10.4 | 11.5 | ND | - | - |
| 2,2-Dimethylbutyric acid | ND | - | - | ND | - | - | ND | - | - |
| 2-Ethylbutyric acid | ND | - | - | 0.651 | 7.36 | 11.1 | ND | - | - |
| 2-Methylvaleric acid | ND | - | - | 2.09 | 6.07 | 2.01 | ND | - | - |
| Caproic acid | 0.0125 | 8.74 | 9.61 | 0.711 | 6.66 | 8.95 | ND | - | - |