Table 4.
Time courses of the formation of the metabolite protocatechuic acid in human fecal suspensions
| Compound (µmol) | Incubation time (h) | |||
|---|---|---|---|---|
| 0 | 6 | 12 | 24 | |
| Gallic acid | 0.96 ± 0.03 | 0.75 ± 0.14* | 0.60 ± 0.18* | 0.27 ± 0.23* |
| Protocatechuic acid | ND | ND | ND | ND |
| Caffeic acid | 0.86 ± 0.03 | 0.16 ± 0.11* | ND | ND |
| Protocatechuic acid | ND | ND | ND | ND |
| 5‐caffeoylquinic acid | 0.79 ± 0.06 | ND | ND | ND |
| Protocatechuic acid | ND | ND | ND | ND |
| Caftaric acid | 0.92 ± 0.05 | ND | ND | ND |
| Protocatechuic acid | ND | ND | ND | ND |
| Chicoric acid | 0.73 ± 0.04 | ND | ND | ND |
| Protocatechuic acid | ND | ND | ND | ND |
Values are the means ± SD, n = 6; ND, not detected.
*
p < .05 compared with the T 0 groups.