Cell phones and cancer: MedlinePlus Medical Encyclopedia

P Several major studies show no link between cell phones and cancer at this time. However, since the information available is based on short-term studies, the impact of many years of exposure is not definitively known.
P The amount of time people spend on cell phones has increased dramatically. This will be taken into consideration during current and future studies. Research continues to investigate whether there is a relationship between long-term cell phone use and slow-growing tumors in the brain or other parts of the body.
P WHAT WE KNOW ABOUT CELL PHONE USE
P Cell phones use low levels of radiofrequency (RF) energy. It is not known whether RF from cell phones causes health problems, because the studies done so far have not been in agreement.
P The US Food and Drug Administration (FDA) and the Federal Communications Commission (FCC) have developed guidelines that limit the amount of RF energy cell phones are allowed to give off.
P The RF exposure from cell phones is measured in specific absorption rate (SAR). The SAR measures the amount of energy absorbed by the body. The SAR permitted in the United States is 1.6 watts per kilogram (1.6 W/kg).
P According to the FCC, this amount is much lower than the level shown to cause any changes in laboratory animals. Every cell phone manufacturer is required to report the RF exposure of each of its phone models to the FCC.
P CHILDREN AND CELL PHONES
P At this time, the effects of cell phone use on children are not clear. However, scientists do know that children absorb more RF than adults. For this reason, some agencies and government organizations recommend that children avoid prolonged use of cell phones.
P REDUCING RISKS
P Although health problems related to long-term cell phone use are thought to be unlikely, you can take steps to limit your potential risk:
- Keep calls short when using your cell phone.
- Use an earpiece or the speaker mode when making calls.
- When not using your cell phone, keep it away from your body, such as in your purse, briefcase, or backpack. Even when a cell phone is not in use, but is still turned on, it continues to give off radiation.
- Find out how much SAR energy your cell phone gives off.

T Alternative Names
P Cancer and cell phones; Do cell phones cause cancer?

T References
P Benson VS, Pirie K, Schüz J, Reeves GK, Beral V, Green J; Million Women Study Collaborators. Mobile phone use and risk of brain neoplasms and other cancers: prospective study. Int J Epidemiol. 2013;42(3):792-802. PMID: 23657200 www.ncbi.nlm.nih.gov/pubmed/23657200.
P Federal Communications Commission. Wireless devices and health concerns. Updated November 8, 2015. www.fcc.gov/consumers/guides/wireless-devices-and-health-concerns. Accessed October 18, 2016.
P National Cancer Institute. Fact sheet: cell phones and cancer risk. Updated May 27, 2016. www.cancer.gov/about-cancer/causes-prevention/risk/radiation/cell-phones-fact-sheet. Accessed October 18, 2016.
P US Food and Drug Administration. Radiation-emitting products. Reducing exposure: hands-free kits and other accessories. Updated August 8, 2012. www.fda.gov/Radiation-EmittingProducts/RadiationEmittingProductsandProcedures/HomeBusinessandEntertainment/CellPhones/ucm116293.htm. Accessed August 31, 2014.

T Review Date 8/22/2016
P Updated by: Laura J. Martin, MD, MPH, ABIM Board Certified in Internal Medicine and Hospice and Palliative Medicine, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

