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Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

DNA & Genetic Damage

Micronuclei in the peripheral blood and bone marrow cells of rats exposed to 2450 MHz radiofrequency radiation.

No Effects Found

Vijayalaxmi, Pickard WF, Bisht KS, Prihoda TJ, Meltz ML, LaRegina MC, Roti Roti JL, Straube WL, Moros EG. · 2001

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No DNA damage was found in rats exposed to 2450 MHz radiation at levels 240 times higher than current safety limits.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 2450 MHz radiofrequency radiation (the same frequency used in microwave ovens and Wi-Fi) for 24 hours at high intensity levels to see if it would damage their DNA. They looked for micronuclei (tiny fragments that indicate genetic damage) in blood and bone marrow cells. The study found no significant DNA damage compared to unexposed rats, even at radiation levels much higher than typical human exposure.

Why This Matters

This study provides important data on DNA damage potential from 2.45 GHz radiation, the frequency used in many wireless devices. The 12 W/kg exposure level is extraordinarily high - roughly 240 times the current FCC limit of 0.08 W/kg for partial body exposure. The fact that no genetic damage was detected even at these extreme levels offers some reassurance about DNA effects at typical exposure levels. However, this represents just one endpoint in one study design. The micronucleus test is a well-established method for detecting chromosomal damage, and the positive control (mitomycin-C) worked as expected, validating the experimental approach. What this means for you is that while this particular study didn't find DNA damage, it's one piece of a much larger puzzle that includes other biological effects beyond genetic damage.

Exposure Details

SAR
12 W/kg
Source/Device
2450 MHz
Exposure Duration
24 hours

Exposure Context

This study used 12 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: 12 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)This level is 8 times the FCC limit
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2.45 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2.45 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

To determine the incidence of micronuclei in peripheral blood and bone marrow cells of rats exposed continuously for 24h to 2450 MHz continuous wave radiofrequency radiation (RFR) at an average whole-body specific absorption rate (SAR) of 12W/kg.

Eight adult male Sprague-Dawley rats were exposed to 2450 MHz RFR in circularly polarized waveguides...

The results indicated that the incidence of MN/2000 PCE were not significantly different between RFR...

There was no evidence for the induction of MN in peripheral blood and bone marrow cells of rats exposed for 24h to 2450 MHz continuous wave RFR at a whole body average SAR of 12 W/kg.

Cite This Study
Vijayalaxmi, Pickard WF, Bisht KS, Prihoda TJ, Meltz ML, LaRegina MC, Roti Roti JL, Straube WL, Moros EG. (2001). Micronuclei in the peripheral blood and bone marrow cells of rats exposed to 2450 MHz radiofrequency radiation. Int J Radiat Biol 77(11):1109-1115, 2001.
Show BibTeX
@article{vijayalaxmi_2001_micronuclei_in_the_peripheral_3472,
  author = {Vijayalaxmi and Pickard WF and Bisht KS and Prihoda TJ and Meltz ML and LaRegina MC and Roti Roti JL and Straube WL and Moros EG.},
  title = {Micronuclei in the peripheral blood and bone marrow cells of rats exposed to 2450 MHz radiofrequency radiation.},
  year = {2001},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/11683981/},
}
PubMed: 11683981

Cited By (41 papers)

Quick Questions About This Study

No, a 2001 study found no DNA damage in rats exposed to 2450 MHz radiation for 24 hours at high intensity levels. Researchers found no significant difference in micronuclei (genetic damage markers) between exposed and unexposed rats, even at radiation levels much higher than typical human exposure.
Research shows 2450 MHz radiation (microwave oven frequency) does not cause genetic damage in bone marrow cells. A controlled study found micronuclei levels in rat bone marrow remained normal after 24-hour exposure, indicating no significant DNA damage occurred at this frequency.
Studies indicate 12 W/kg SAR exposure does not damage blood cells. Rats exposed to this high radiation level for 24 hours showed no increase in micronuclei in peripheral blood cells compared to unexposed animals, suggesting no genetic damage occurs at this intensity.
Continuous wave 2450 MHz radiation does not appear to damage cellular DNA based on laboratory studies. Researchers found no evidence of micronuclei formation in rat cells after 24-hour exposure, indicating this radiation type doesn't cause detectable genetic damage.
The 2001 study used 12 W/kg radiation exposure without causing DNA damage, which is significantly higher than typical WiFi exposure levels. Only positive control rats treated with a known DNA-damaging chemical showed the expected genetic damage, confirming the test methods worked properly.