8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Brain & Nervous System

Extremely low-frequency magnetic fields modulate nitric oxide signaling in rat brain.

Bioeffects Seen

Cho SI, Nam YS, Chu LY, Lee JH, Bang JS, Kim HR, Kim HC, Lee YJ, Kim HD, Sul JD, Kim D, Chung YH, Jeong JH. · 2012

View Original Abstract
Share:

Power-frequency magnetic fields alter brain chemistry by increasing nitric oxide production in key brain regions, challenging assumptions about biological safety.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 60 Hz magnetic fields (from household electrical systems) for five days and found increased nitric oxide production in key brain regions. This brain chemical affects blood flow and neuron communication, suggesting everyday power-frequency magnetic field exposure may alter fundamental brain chemistry.

Why This Matters

This study reveals something concerning about the magnetic fields we encounter daily from electrical wiring and appliances. The 2 mT exposure level used here is actually quite high compared to typical household levels (which range from 0.01 to 0.2 mT), but it demonstrates that power-frequency magnetic fields can directly alter brain chemistry. What makes this research particularly significant is that nitric oxide plays dual roles in the brain - it's essential for normal function but can become harmful when overproduced. The researchers found increased nitric oxide production across multiple brain regions, suggesting these effects aren't isolated to one area. While the study doesn't prove harm, it shows that ELF magnetic fields are biologically active in the brain, contradicting the long-held assumption that non-ionizing radiation at these frequencies is biologically inert. The reality is that your brain responds to the same 60 Hz frequency that powers your home.

Exposure Details

Magnetic Field
2 mG
Source/Device
60 Hz
Exposure Duration
5 days

Exposure Context

This study used 2 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: 2 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Severe Concern rangeFCC limit is 1,000x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 60 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

The present study was designed to confirm that ELF‐MF affects neuronal NOS (nNOS) in several brain regions and to investigate the correlation between NO and nNOS activation.

The exposure of rats to a 2 mT, 60 Hz ELF‐MF for 5 days resulted in increases of NO levels in parall...

Based on NO signaling in physiological and pathological states, ELF‐MF created by electric power systems may induce various physiological changes in modern life.

Cite This Study
Cho SI, Nam YS, Chu LY, Lee JH, Bang JS, Kim HR, Kim HC, Lee YJ, Kim HD, Sul JD, Kim D, Chung YH, Jeong JH. (2012). Extremely low-frequency magnetic fields modulate nitric oxide signaling in rat brain. Bioelectromagnetics. 33(7):568-574, 2012.
Show BibTeX
@article{si_2012_extremely_lowfrequency_magnetic_fields_229,
  author = {Cho SI and Nam YS and Chu LY and Lee JH and Bang JS and Kim HR and Kim HC and Lee YJ and Kim HD and Sul JD and Kim D and Chung YH and Jeong JH. },
  title = {Extremely low-frequency magnetic fields modulate nitric oxide signaling in rat brain.},
  year = {2012},
  doi = {10.1002/bem.21715},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.21715},
}
DOI: 10.1002/bem.21715

Cited By (44 papers)

Quick Questions About This Study

Research shows 60 Hz magnetic fields from household electrical systems can alter brain chemistry. A 2012 rat study found five days of exposure increased nitric oxide production in key brain regions, suggesting everyday power-frequency fields may change fundamental brain signaling processes.
Studies indicate 60 Hz electromagnetic fields can affect brain function. Researchers found this common household frequency increased nitric oxide levels in rat brains after five days of exposure, potentially altering blood flow and neuron communication without causing visible brain damage.
Power-frequency magnetic fields may influence brain chemistry. A controlled study showed 60 Hz exposure increased nitric oxide production in rat brain regions responsible for movement, memory, and thinking, suggesting household electrical systems could affect neurological processes in living organisms.
Electrical EMF exposure may alter brain chemistry without causing structural damage. Research demonstrates 60 Hz magnetic fields increase nitric oxide production in key brain areas, potentially affecting blood flow and nerve signaling, though long-term health implications remain under investigation.
EMF exposure appears to modify brain chemical pathways. Scientists found 60 Hz magnetic field exposure increased nitric oxide levels and related brain chemicals in rats, suggesting electromagnetic fields from common electrical sources may influence how neurons communicate with each other.