8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
DNA & Genetic Damage

DNA damage induced in brain cells of CBA mice exposed to magnetic fields

Bioeffects Seen

Authors not listed · 1999

Share:

Two weeks of 50 Hz magnetic field exposure caused significant DNA damage in mouse brain cells, suggesting cumulative genetic effects from power line frequencies.

Plain English Summary

Summary written for general audiences

Swedish researchers exposed mice to 50 Hz magnetic fields (the same frequency as power lines) at 0.5 mT strength for different time periods. After 14 days of continuous exposure, brain cells showed significant DNA damage using a comet assay test. This suggests that prolonged exposure to power line frequency magnetic fields may be genotoxic to brain tissue.

Why This Matters

This 1999 Swedish study adds to mounting evidence that power line frequency EMF can damage the genetic material in our most vital organ. The researchers used 0.5 mT field strength, which is 500 times stronger than typical household exposures but within the range found near high-voltage power lines or certain occupational settings. What makes this finding particularly concerning is that DNA damage only appeared after 14 days of continuous exposure, not after shorter periods. This suggests cumulative effects that wouldn't show up in brief laboratory studies.

The comet assay used here is a gold standard test for detecting DNA strand breaks, the type of genetic damage that can lead to cancer and other health problems. While we can't directly extrapolate mouse studies to humans, the brain's fundamental cellular processes are remarkably similar across mammalian species. The reality is that millions of people live within a few hundred meters of power lines, and some occupational workers face even higher exposures daily.

Exposure Information

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

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (1999). DNA damage induced in brain cells of CBA mice exposed to magnetic fields.
Show BibTeX
@article{dna_damage_induced_in_brain_cells_of_cba_mice_exposed_to_magnetic_fields_ce4229,
  author = {Unknown},
  title = {DNA damage induced in brain cells of CBA mice exposed to magnetic fields},
  year = {1999},
  
  
}
PubMed: 10757053

Quick Questions About This Study

Yes, Swedish researchers found that 0.5 millitesla (mT) magnetic fields at 50 Hz caused significant DNA damage in mouse brain cells after 14 days of continuous exposure, as measured by comet assay testing.
DNA damage appeared only after 14 days of continuous exposure, not after 2 hours or 5 days. This suggests that genetic damage from power line frequencies requires prolonged exposure to manifest.
Comet assay (single cell gel electrophoresis) measures DNA strand breaks by observing how damaged genetic material migrates through gel. It's considered a gold standard test for detecting genotoxic effects from radiation exposure.
While mouse studies cannot directly predict human effects, CBA mice are a standard laboratory strain with brain cellular processes similar to humans, making them relevant models for EMF genotoxicity research.
This field strength is 500 times higher than typical household levels but occurs near high-voltage power lines and in certain occupational settings like electrical substations or industrial facilities.