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Extremely low frequency magnetic fields cause oxidative DNA damage in rats

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Yokus B, Akdag MZ, Dasdag S, Cakir DU, Kizil M · 2008

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Long-term exposure to power line frequency magnetic fields caused DNA damage in rats at levels commonly found near electrical infrastructure.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to power line frequency magnetic fields for 10 months and found DNA damage in their blood cells. The exposure caused oxidative damage that creates genetic mutations potentially leading to cancer, providing first direct evidence of cellular harm.

Why This Matters

This research breaks important new ground by demonstrating that power frequency magnetic fields can cause specific, measurable DNA damage in living mammals. The exposure levels used (100-500 microtesla) are well within the range you might encounter near power lines, electrical panels, or some household appliances, making these findings directly relevant to human health concerns. What makes this study particularly significant is that it identified the exact molecular mechanisms of DNA damage, including oxidative modifications that are known precursors to cancer. The science demonstrates that chronic EMF exposure doesn't just correlate with health problems - it can actually damage the genetic material in our cells. While this was an animal study, the biological processes involved are fundamentally the same in humans, suggesting we may be facing similar risks from our increasingly electrified environment.

Exposure Details

Magnetic Field
0.1 and 0.5 mG
Source/Device
50 Hz
Exposure Duration
2 hours/day during 10 months

Exposure Context

This study used 0.1 and 0.5 mG for magnetic fields:

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: 0.1 and 0.5 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the No Concern rangeFCC limit is 20,000x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

To detect the genotoxic effects of extremely low frequency (ELF) -magnetic fields (MF) on oxidative DNA base modifications [8-hydroxyguanine (8-OH-Gua), 2,6-diamino-4-hydroxy-5-formamidopyrimidine (FapyGua) and 4,6-diamino-5-formamidopyrimidine (FapyAde)] in rat leucocytes, measured following exposure to ELF-MF.

After exposure to ELF-MF (50 Hz, 100 and 500 μT, for 2 hours/day during 10 months), DNA was extracte...

Levels of FapyAde, FapyGua and 8OHdG in DNA were increased by both 100 μT and 500 μT ELF-MF as compa...

This is the first study to report that ELF-MF exposure generates oxidatively induced DNA base modifications which are mutagenic in mammalian cells, such as FapyGua, FapyAde and 8-OH-Gua, in vivo. This may explain previous studies showing DNA damage and genomic instability. These findings support the hypothesis that chronic exposure to 50-Hz MF may be potentially genotoxic. However, the intensity of ELF-MF has an important influence on the extent of DNA damage.

Cite This Study
Yokus B, Akdag MZ, Dasdag S, Cakir DU, Kizil M (2008). Extremely low frequency magnetic fields cause oxidative DNA damage in rats Int J Radiat Biol. 84(10):789-795, 2008.
Show BibTeX
@article{b_2008_extremely_low_frequency_magnetic_486,
  author = {Yokus B and Akdag MZ and Dasdag S and Cakir DU and Kizil M},
  title = {Extremely low frequency magnetic fields cause oxidative DNA damage in rats},
  year = {2008},
  doi = {10.1080/09553000802348203},
  url = {https://www.tandfonline.com/doi/abs/10.1080/09553000802348203},
}
DOI: 10.1080/09553000802348203

Cited By (55 papers)

View all 55 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, a 2008 study found that 50 Hz magnetic fields caused significant oxidative DNA damage in rats after 10 months of exposure. The researchers detected increased levels of mutagenic DNA modifications like FapyGua and 8-OH-Gua, which can lead to genetic mutations and potentially cancer.
Ten months of 100 μT magnetic field exposure significantly increased three oxidative DNA damage markers: FapyAde, FapyGua, and 8OHdG. These modifications are mutagenic and represent the first direct evidence that power frequency magnetic fields cause oxidatively induced DNA base damage in living mammals.
The 2008 rat study found that 100 μT magnetic field exposure caused statistically significant DNA damage, while 500 μT exposure showed increased damage markers but without statistical significance. This suggests that lower intensity magnetic fields may actually be more consistently harmful to DNA.
Research indicates yes - a 10-month study found that 50 Hz magnetic field exposure generates oxidatively induced DNA modifications that are mutagenic in mammalian cells. These genetic changes could explain previous studies showing DNA damage and genomic instability from power frequency EMF.
The 2008 study exposed rats to 50 Hz magnetic fields for 10 months before detecting significant oxidative DNA damage. This represents the first direct evidence of cellular genetic harm from chronic power line frequency magnetic field exposure in living mammals.