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DNA & Genetic Damage244 citations

Genotoxicity of radiofrequency signals. I. Investigation of DNA damage and micronuclei induction in cultured human blood cells.

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Tice RR, Hook GG, Donner M, McRee DI, Guy AW. · 2002

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Cell phone radiation caused four-fold increase in chromosomal damage after 24-hour exposure at 5-10 W/kg power levels.

Plain English Summary

Summary written for general audiences

Researchers exposed human blood cells to cell phone radiation from different technologies (CDMA, TDMA, GSM) at various power levels for 3 or 24 hours. They found that 24-hour exposures at higher power levels (5-10 W/kg) caused a four-fold increase in chromosomal damage across all phone technologies tested. This suggests that prolonged exposure to cell phone radiation can damage the genetic material in human immune cells.

Why This Matters

This study provides compelling evidence that cell phone radiation can cause chromosomal damage in human blood cells under laboratory conditions. What makes this research particularly significant is that it tested actual cell phone signals from multiple technologies and found consistent genetic damage across all of them. The SAR levels that caused damage (5-10 W/kg) are well above typical phone usage levels (around 1.6 W/kg maximum), but the study demonstrates a clear biological mechanism by which RF radiation can affect our cells. The fact that damage occurred only after 24 hours of continuous exposure suggests that duration matters as much as intensity. This research adds to the growing body of evidence showing that wireless radiation isn't as biologically inert as the telecommunications industry claims.

Exposure Details

SAR
01-Oct W/kg
Source/Device
837 MHz, voice modulated 1909.8 MHz
Exposure Duration
3 or 24 Hours

Exposure Context

This study used 01-Oct W/kg for SAR (device absorption):

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 01-Oct W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 2x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 837 MHz - 1.91 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 837 MHz - 1.91 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

In vitro studies evaluated the induction of DNA and chromosomal damage in human blood leukocytes and lymphocytes, respectively.

The signals were voice modulated 837 MHz produced by an analog signal generator or by a time divisio...

Exposure for either 3 or 24 h did not induce a significant increase in DNA damage in leukocytes, nor...

This research demonstrates that, under extended exposure conditions, RF signals at an average SAR of at least 5.0 W/kg are capable of inducing chromosomal damage in human lymphocytes.

Cite This Study
Tice RR, Hook GG, Donner M, McRee DI, Guy AW. (2002). Genotoxicity of radiofrequency signals. I. Investigation of DNA damage and micronuclei induction in cultured human blood cells. Bioelectromagnetics 23:113-126, 2002.
Show BibTeX
@article{rr_2002_genotoxicity_of_radiofrequency_signals_1363,
  author = {Tice RR and Hook GG and Donner M and McRee DI and Guy AW.},
  title = {Genotoxicity of radiofrequency signals. I. Investigation of DNA damage and micronuclei induction in cultured human blood cells.},
  year = {2002},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/11835258/},
}
PubMed: 11835258

Cited By (244 papers)

View all 244 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, a 2002 study found that 24-hour exposure to cell phone radiation at 5-10 W/kg power levels caused a four-fold increase in chromosomal damage in human blood cells. This occurred across all phone technologies tested (CDMA, TDMA, GSM), while shorter 3-hour exposures showed no significant damage.
Research demonstrates that cell phone radiation at SAR levels of 5.0 W/kg and above causes significant chromosomal damage in human lymphocytes after 24-hour exposure. The damage was consistent across different frequencies (837 MHz and 1909.8 MHz) and phone technologies, showing approximately four-fold increases in micronucleated cells.
Yes, a 2002 study found that CDMA, TDMA, and GSM cell phone technologies all caused identical levels of chromosomal damage in human blood cells. After 24-hour exposure at 5-10 W/kg, each technology produced approximately four-fold increases in genetic damage, regardless of frequency or voice modulation.
Cell phone radiation requires extended exposure to damage immune cells. A 2002 study found that 3-hour exposures caused no significant genetic damage, but 24-hour exposures at 5-10 W/kg power levels resulted in four-fold increases in chromosomal damage in human lymphocytes across all tested frequencies.
No, voice modulation does not affect the genetic damage caused by cell phone radiation. Research found that both voice-modulated and unmodulated signals at 837 MHz and 1909.8 MHz caused identical four-fold increases in chromosomal damage in human blood cells after 24-hour exposure at 5-10 W/kg levels.