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Cellular detection of 50 Hz magnetic fields and weak blue light: effects on superoxide levels and genotoxicity.

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Höytö A, Herrala M, Luukkonen J, Juutilainen J, Naarala J. · 2017

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Magnetic fields at 100 microtesla increased cellular damage in brain cells, showing effects occur without light at levels comparable to household appliances.

Plain English Summary

Summary written for general audiences

Finnish researchers exposed human brain cells to 50 Hz magnetic fields from power lines for 24 hours. The fields increased harmful superoxide molecules in cells and enhanced DNA damage when combined with blue light, showing magnetic fields can affect cells independently of light exposure.

Why This Matters

This research adds important nuance to our understanding of how extremely low frequency magnetic fields affect cellular health. The 100 microtesla exposure level used here is significant because it's well within the range of everyday exposures - about 10 times higher than typical home background levels but comparable to what you'd experience near some appliances or power lines. What makes this study particularly valuable is that it demonstrates magnetic field effects occur through light-independent mechanisms, meaning these cellular changes can happen regardless of lighting conditions. The finding that magnetic fields increased oxidative stress (harmful superoxide molecules) aligns with a growing body of research showing that EMF exposure can disrupt normal cellular processes. While this was a laboratory study using isolated cells rather than whole organisms, it provides mechanistic evidence for how magnetic fields might contribute to biological effects at exposure levels people actually encounter in daily life.

Exposure Details

Magnetic Field
0.1 mG
Source/Device
50 Hz
Exposure Duration
24 h

Exposure Context

This study used 0.1 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 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

We tested the hypothesis that the effects of 50 Hz magnetic fields (MFs) on superoxide levels and genotoxicity depend on the presence of blue light.

Human SH-SY5Y neuroblastoma cells were exposed to a 50 Hz, 100 μT MF with or without non-phototoxic ...

MF (without blue light) increased cytosolic O2• - production and blue light suppressed this effect. ...

The original simple hypothesis (blue light is needed for MF effects) was not supported, but interaction of MF and blue light was nevertheless observed. The results are consistent with MF effects on light-independent radical reactions.

Cite This Study
Höytö A, Herrala M, Luukkonen J, Juutilainen J, Naarala J. (2017). Cellular detection of 50 Hz magnetic fields and weak blue light: effects on superoxide levels and genotoxicity. Int J Radiat Biol, 93(6):646-652, 2017.
Show BibTeX
@article{a_2017_cellular_detection_of_50_386,
  author = {Höytö A and Herrala M and Luukkonen J and Juutilainen J and Naarala J.},
  title = {Cellular detection of 50 Hz magnetic fields and weak blue light: effects on superoxide levels and genotoxicity.},
  year = {2017},
  doi = {10.1080/09553002.2017.1294275},
  url = {https://www.tandfonline.com/doi/abs/10.1080/09553002.2017.1294275},
}
DOI: 10.1080/09553002.2017.1294275

Cited By (22 papers)

Quick Questions About This Study

Finnish research shows 50 Hz magnetic fields from power lines can increase harmful superoxide molecules in human brain cells and enhance DNA damage when combined with blue light exposure, demonstrating cellular effects occur independently of light.
A 2017 study found that 50 Hz magnetic fields typical of power lines altered superoxide production in human brain cells after 24-hour exposure, showing electromagnetic fields can directly impact cellular processes in brain tissue.
Research demonstrates 50 Hz magnetic fields from power lines increase oxidative stress in cells by boosting harmful superoxide molecules. The study also found these fields enhance DNA damage when combined with blue light exposure.
Power line magnetic fields (50 Hz) increase production of superoxide, a harmful molecule that causes oxidative stress in cells. Finnish researchers found these effects occur in human brain cells after 24 hours of exposure.
Magnetic fields at 50 Hz frequency increase superoxide production in cells, creating oxidative stress. When combined with blue light, these fields significantly enhance DNA damage markers, showing multiple pathways for cellular harm.