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Pre-treatment with green leaf vegetables increases intracellular glutathione levels in HCT116 cells. bP<0.01 comparing treated to control cells (mean±SD).
| Vegetable | Total GSH (nmol-1/mg-1protein) |
| Ctrl | 15.2±0.4 |
| Watercress “Rorripa” | 33.2±2.7b |
| Broccoli | 28.7±0.5b |
| Choi Sum | 25.1±1.9b |
| Pheuy leng | 25.2±2.2b |
