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DNA & Genetic Damage130 citations

Oxidative DNA damage in rats exposed to extremely low frequency electromagnetic fields.

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Yokus B, Cakir DU, Akdag MZ, Sert C, Mete N · 2005

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Rats exposed to power-line frequency magnetic fields showed increasing DNA damage over time, suggesting cumulative genetic harm from long-term EMF exposure.

Plain English Summary

Summary written for general audiences

Turkish researchers exposed laboratory rats to 50 Hz magnetic fields (the same frequency as power lines) for 50 and 100 days to measure DNA damage. They found that exposed rats had significantly more oxidative DNA damage and cellular damage markers compared to unexposed rats, with the damage increasing over time. This suggests that long-term exposure to power-frequency magnetic fields may cause cumulative genetic damage at the cellular level.

Why This Matters

This study adds important evidence to the growing body of research showing that extremely low frequency magnetic fields can cause oxidative DNA damage. The exposure level of 0.97 mT is considerably higher than typical household exposures (which range from 0.01 to 0.2 mT near appliances), but falls within levels you might encounter very close to power lines or electrical equipment. What makes this research particularly significant is the time-dependent effect - the DNA damage increased with longer exposure periods, suggesting cumulative harm rather than temporary cellular stress. The science demonstrates that ELF magnetic fields can trigger oxidative stress pathways that damage genetic material, the same mechanisms linked to aging and disease development. While we need more research to fully understand the health implications, this study reinforces why minimizing unnecessary EMF exposure makes biological sense.

Exposure Details

Magnetic Field
0.97 mG
Source/Device
50 Hz
Exposure Duration
50 and 100 days

Exposure Context

This study used 0.97 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: 0.97 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Slight Concern rangeFCC limit is 2,062x 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 sudy the oxidative DNA damage in rats exposed to extremely low frequency electro magnetic fields.

We examined the effects of extremely low frequency electro magnetic field (ELF-EMF) (50 Hz, 0.97 mT)...

Our results showed that the exposure to ELF-EMF induced oxidative DNA damage and lipid peroxidation ...

Our data may have important implications for the long-term exposure to ELF-EMF which may cause oxidative DNA damage.

Cite This Study
Yokus B, Cakir DU, Akdag MZ, Sert C, Mete N (2005). Oxidative DNA damage in rats exposed to extremely low frequency electromagnetic fields. Free Radic Res. 39(3):317-323, 2005.
Show BibTeX
@article{b_2005_oxidative_dna_damage_in_485,
  author = {Yokus B and Cakir DU and Akdag MZ and Sert C and Mete N},
  title = {Oxidative DNA damage in rats exposed to extremely low frequency electromagnetic fields.},
  year = {2005},
  doi = {10.1080/10715760500043603},
  url = {https://www.tandfonline.com/doi/abs/10.1080/10715760500043603},
}
DOI: 10.1080/10715760500043603

Cited By (130 papers)

View all 130 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, Turkish researchers found that rats exposed to 50 Hz magnetic fields for 50-100 days showed significantly higher levels of oxidative DNA damage markers (8OHdG) compared to unexposed rats. The damage increased with longer exposure times, suggesting cumulative genetic harm from power-frequency electromagnetic fields.
This 2005 study found measurable DNA damage in rats after 50 days of exposure to 50 Hz magnetic fields, with damage levels increasing further at 100 days. The researchers observed that both oxidative DNA damage and cellular lipid damage worsened with longer exposure duration.
8OHdG is a biomarker that indicates oxidative DNA damage. In this study, rats exposed to 50 Hz electromagnetic fields showed 8OHdG levels of 4.39-5.29 per 100,000 DNA bases, significantly higher than unexposed rats at 3.02-3.46, indicating more genetic damage from EMF exposure.
Yes, rats exposed to 50 Hz electromagnetic fields showed significantly higher TBARS levels, indicating increased lipid peroxidation (cellular membrane damage). This occurred alongside DNA damage, suggesting that power-frequency EMF causes multiple types of oxidative cellular damage, not just genetic harm.
Yes, this study used 50 Hz electromagnetic fields, which is the exact frequency of household electricity and power lines in most countries (60 Hz in North America). The findings suggest that common electrical infrastructure may pose cumulative DNA damage risks with long-term exposure.