The exposure limits currently set by the FCC (Federal Communications Commission, USA) and ICNIRP (International Commission on Non-Ionizing Radiation Protection, EU) are based on behavioral studies of rats (n = 8) and monkeys (n = 6) from the 1980s. These studies examined only one criterion. Specifically, they investigated the frequencies and power densities at which the response rate for pressing a lever to release food pellets would be significantly lower than that of the control group after 40 or 60 minutes of exposure. No other endpoints or exposure durations were evaluated. An increase in core body temperature of approximately 1.0°C was used to establish a specific absorption rate of 4 W/kg as the threshold for harmful health effects of radiofrequency (RF) radiation. This limit remains in effect today. For the general population, the limit was reduced to 0.08 W/kg by applying arbitrary safety factors. Chronic exposure and non-thermal effects are not considered. However, two recent systematic reviews [1,2] by the World Health Organization (WHO) concluded with "high certainty of evidence" that RF exposure is associated with an increased risk of cancer and reduced male fertility. The authors, including a former senior scientist at the U.S. National Toxicology Program (NTP), used data from existing animal models to calculate more verifiable exposure limits.
Study design and implementation:
Regarding the tumor data, the scientists performed benchmark dose (BMD) analyses using the tumor rates from the rat models in the NTP and Ramazzini Institute studies. Since the tumor induction mechanism is unknown, the scientists used low-dose linear extrapolation of the BMD01 (1% increased risk) and BMDL01 (lower 95% confidence interval for a 1% increased risk) values in accordance with Environmental Protection Agency (EPA) guidelines for cancer risk assessment. This linear extrapolation provides estimates of the whole-body specific absorption rate (SAR) associated with an additional cancer risk of one in 100,000. For the adverse effect on male fertility, the authors used the linear potency of a 3% reduction in the conception rate per W/kg, as reported in reference [2]. They also applied standardized uncertainty factors (10X for extrapolation from animals to humans, 10X for differences between individual humans, and 3X if a no-observed-adverse-effect level (NOAEL) was not identified).
Results:
Depending on the underlying study, the derived SAR value, which corresponds to a 1 in 100,000 increase in cancer risk, ranges from 0.7 to 5.3 mW/kg for one hour of daily RF exposure. The current ICNIRP/FCC whole-body limit for the general population is 80 mW/kg. With one hour of daily exposure, the current limit exceeds the acceptable cancer risk by a factor of 15 to 114. With eight hours of daily exposure, the excess risk is 121 to 909 times greater. For male fertility, applying the standardized uncertainty factors yields limits of 3.3 to 10 mW/kg. Thus, the current limit is eight to 24 times too high.
Conclusions:
The exposure limits for mobile phones currently set by the FCC and ICNIRP do not ensure the physical safety of the general population. For occupational exposure groups (400 mW/kg), the prognosis worsens by a factor of five. The authors call for an independent reassessment of these limits that incorporates scientific findings from the past 30 years and applies standardized risk assessment methods. Furthermore, the authors acknowledge the possibility of underestimating the actual risk because the SAR value alone is an inadequate metric (in that it disregards the biological interactions at the molecular level caused by wireless devices used next to one’s body).
Editor’s note:
The authors use the same tools that health authorities worldwide use to evaluate the risks of chemical carcinogens. According to the same standards, if mobile phone radiation were a chemical, it would be classified as an unacceptable health risk. It is alarming that even one hour of daily mobile phone use within regulatory limits significantly exceeds the acceptable cancer risk. This publication provides a solid foundation that makes the need to reform the outdated thermal dogma undeniable. (RH)
1. Mevissen M, Ducray A, Ward JM, Kopp-Schneider A, McNamee JP, Wood AW et al. (2024). Effects of radiofrequency electromagnetic field exposure on cancer in laboratory animal studies, a systematic review. Environmental International, 199, 109482. https://doi.org/10.1016/j.envint.2025.109482
2. Cordelli E, Ardoino L, Benassi B, Consales C, Eleuteri P, Marino C et al. (2024). Effects of radiofrequency electromagnetic field (RF-EMF) exposure on male fertility: A systematic review of experimental studies on non-human mammals and human sperm in vitro. Environmental International, 185, 108509. https://doi.org/10.1016/j.envint.2024.108509