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Twelve-hour urinary excretion of12C-hippuric acid by subjects on a low (poly)phenol diet [12] compared with excretion of14C-hippuric acid following the ingestion of 207 μmol [14C](−)-epicatechin [51,52]. Subjects in both groups have a full gastrointestinal tract.
| Source | 0–12 h urinary excretion |
|---|---|
| Baseline with colon | 12C-hippuric acid: 366 ± 28 μmol |
| 207 μmol [14C]-(−)-Epicatechin |
14C-hippuric acid:13.4 ± 2.9 μmol (7.2% of intake) Total12/14C-hippuric acid 379 μmol (14C - 3.5%) |
