However, that heating is not sufficient to measurably increase core body temperature. The only consistently recognized biological effect of radiofrequency radiation absorption in humans that the general public might encounter is heating to the area of the body where a cell phone is held (e.g., the ear and head). The human body does absorb energy from devices that emit radiofrequency radiation. More information about ionizing radiation can be found on the Radiation page. The NCI fact sheet Electromagnetic Fields and Cancer lists sources of radiofrequency radiation. DNA damage can cause changes to genes that may increase the risk of cancer. Energy from ionizing radiation can damage DNA. By contrast, ionizing radiation, which includes x-rays, radon, and cosmic rays, is high frequency and high energy. These frequencies all fall in the nonionizing range of the spectrum, which is low frequency and low energy. Fifth-generation (5G) cell phones are anticipated to use the frequency spectrum up to 80 GHz. Second-, third-, and fourth-generation cell phones (2G, 3G, 4G) emit radiofrequency in the frequency range of 0.7–2.7 GHz. What can cell phone users do to reduce their exposure to radiofrequency radiation?Ĭell phones emit radiation in the radiofrequency region of the electromagnetic spectrum. Where can I find more information about radiofrequency radiation from my cell phone? Which US federal agencies have a role in evaluating the effects of or regulating cell phones? Has radiofrequency radiation from cell phone use been associated with cancer risk in children? What studies of cell phone health effects are under way? What have expert organizations said about the cancer risk from cell phone use? What are other possible health effects from cell phone use? Why are the findings from different studies of cell phone use and cancer risk inconsistent? What are the findings from experiments in laboratory animals? What are the findings from studies of the human body? What has research shown about the link between cell phone use and cancer risk? How is radiofrequency radiation exposure measured in studies of groups of people? Has the incidence of brain and central nervous system cancers changed during the time cell phone use increased?
Is the radiation from cell phones harmful? Why has there been concern that cell phones may cause cancer?
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