Reverse-phase HPLC chromatograms obtained from analysis of a 24-h human urine sample after consumption of cooked watercress (a) and raw watercress (b).

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Reverse-phase HPLC chromatograms obtained from analysis of a 24-h human urine sample after consumption of cooked watercress (a) and raw watercress (b). Reverse-phase HPLC chromatograms obtained from analysis of a 24-h human urine sample after consumption of cooked watercress (a) and raw watercress (b). Peak at 3.2 min is identified as 1,3-benzodithiole-2-thione by its retention time and UV spectrum as compared to the synthetic standard. Serkadis M. Getahun, and Fung-Lung Chung Cancer Epidemiol Biomarkers Prev 1999;8:447-451 ©1999 by American Association for Cancer Research