The science is far from settled on the question of whether cell phone use increases the risk of cancer. Lab experiments have not established a definitive link between cellular radiation and cancer, but some research, such as the U.S. National Toxicology Program finding that radiofrequency radiation increased tumor incidence in male rats, has given enough indication of a potential link to warrant further study. Similarly, epidemiologic investigations including the Interphone study have provided mixed evidence of possible statistical associations between specific types of tumor and cell phone use, especially in relation to intensive cell phone users. As cell phones continue to become more widespread and cellular technologies continue to evolve, more definitive scientific research will be needed to validate or refute the safety of cell phones.
[P1] The evidence about the link between cell phones and cancer vary significantly.