In the first study "cytotoxicity" shows that the tea, actually the synergistic components of the tea, once processed through the digestive system including the liver, exhibited cell killing abilities towards both ovarian and prostrate cancer cells…
In the second study, if I understand correctly, the tea did not cause any harm to other tissues, gastric/digestive tissues, or change the physiology of the rats.
This implies, at least to me any way, that drinking the tea is safe, and once digested and processed, whatever is in the tea is used by the body and sent to go after the cancer cells.