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Number of animal studies showing protective or no protective effects of tea on tumor formation in different organsa
| Site | Protective effect | No protective effect |
|---|---|---|
| Lung | 19 (1) | 2 |
| Oral cavity | 3 | - |
| Esophagus | 4 | - |
| Stomach | 7 | - |
| Small intestine | 6 | 1 |
| Colon | 7 (2) | 5 |
| Skin | 24 (1) | - |
| Prostate | 2 (4) | - |
| Breast | 8 (5) | 4 |
| Liver | 7 | 1 |
| Bladder | 2 (1) | - |
| Pancreas | 2 (1) | - |
| Thyroid | 1 | - |
The number of xenograft studies is in parentheses.
