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Oxidative Stress

Extremely Low Frequency Magnetic Field (50 Hz, 0.5 mT) Reduces Oxidative Stress in the Brain of Gerbils Submitted to Global Cerebral Ischemia.

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Rauš Balind S, Selaković V, Radenović L, Prolić Z, Janać B. · 2014

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Power-frequency magnetic fields reduced brain damage from stroke in gerbils, showing EMF effects depend heavily on biological context.

Plain English Summary

Summary written for general audiences

Researchers exposed stroke-damaged gerbils to power line frequency magnetic fields for seven days. While initially increasing brain stress, the magnetic field exposure ultimately protected against stroke damage, returning brain stress markers to normal levels by day fourteen, suggesting potential therapeutic benefits.

Why This Matters

This study presents an intriguing paradox in EMF research. While we typically focus on the harmful effects of extremely low frequency magnetic fields from power lines and electrical devices, this research suggests these same fields might offer protective benefits under certain conditions. The 0.5 mT exposure level used here is significantly higher than typical household exposures (which range from 0.01 to 0.2 mT near appliances), making direct application to everyday EMF exposure questionable. However, the findings add complexity to our understanding of how EMF affects biological systems. The research demonstrates that EMF effects aren't simply good or bad, but depend heavily on context, timing, and existing health conditions. What this means for you is that the biological effects of EMF exposure are more nuanced than often portrayed, though this doesn't diminish concerns about chronic low-level exposures from our daily environment.

Exposure Details

Magnetic Field
0.5 mG
Source/Device
50 Hz
Exposure Duration
7 days

Exposure Context

This study used 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: 0.5 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Slight Concern rangeFCC limit is 4,000x 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

The aim of this study was to determine if extremely low frequency magnetic field (ELF-MF, 50 Hz, 0.5 mT) affects oxidative stress in the brain of gerbils submitted to 10-min global cerebral ischemia.

After occlusion of both carotid arteries, 3-month-old gerbils were continuously exposed to ELF-MF fo...

Ischemia per se increased oxidative stress in the brain on the 7(th) and 14(th) day after reperfusi...

The results presented here indicate a beneficial effect of ELF-MF (50 Hz, 0.5 mT) in the model of global cerebral ischemia.

Cite This Study
Rauš Balind S, Selaković V, Radenović L, Prolić Z, Janać B. (2014). Extremely Low Frequency Magnetic Field (50 Hz, 0.5 mT) Reduces Oxidative Stress in the Brain of Gerbils Submitted to Global Cerebral Ischemia. PLoS One. 2014 Feb 19;9(2):e88921. doi: 10.1371/journal.pone.0088921.
Show BibTeX
@article{s_2014_extremely_low_frequency_magnetic_286,
  author = {Rauš Balind S and Selaković V and Radenović L and Prolić Z and Janać B.},
  title = {Extremely Low Frequency Magnetic Field (50 Hz, 0.5 mT) Reduces Oxidative Stress in the Brain of Gerbils Submitted to Global Cerebral Ischemia.},
  year = {2014},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/24586442/},
}
PubMed: 24586442

Cited By (43 papers)

Quick Questions About This Study

Research suggests 50 Hz magnetic fields may help stroke recovery. A 2014 study found that power line frequency magnetic fields reduced brain damage in stroke-affected gerbils, returning brain stress markers to normal levels after two weeks of exposure.
Yes, specific magnetic field exposure may reduce brain damage from stroke. Researchers found that 50 Hz magnetic fields initially increased brain stress but ultimately protected against stroke damage, suggesting potential therapeutic benefits for brain recovery.
A 2014 study found 50 Hz magnetic fields initially increased brain stress but ultimately provided protection against stroke damage. The exposure reduced oxidative stress and returned brain markers to normal levels within two weeks.
Magnetic fields can initially increase brain oxidative stress but may provide long-term protection. Research shows 50 Hz magnetic field exposure ultimately reduced stroke-related brain damage and normalized stress markers after fourteen days of treatment.
Magnetic field therapy may help protect the brain from stroke damage. A study found that 50 Hz magnetic field exposure reduced oxidative stress in stroke-affected brains, returning damage markers to normal levels after two weeks.