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Manojlović-Stojanoski, V

Bioeffects Seen

Rauš Balind S, M. · 2016

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Power line frequency magnetic fields caused stress-related hormone cell damage in rats within just one day of exposure.

Plain English Summary

Summary written for general audiences

Serbian researchers exposed rats to 50 Hz magnetic fields at 0.5 mT (similar to power line frequencies) for periods ranging from one day to three months. The magnetic field exposure caused significant structural changes to pituitary ACTH cells, which are crucial for stress hormone regulation. Even short-term exposure reduced cell numbers and volumes, leading researchers to classify this EMF as a stress-inducing factor.

Why This Matters

This study reveals a concerning biological response to power line frequency EMF at levels that exceed typical household exposure but remain within ranges found near electrical infrastructure. The 0.5 mT field strength is roughly 10-50 times higher than what you'd experience from most home appliances, but similar to levels measured directly under high-voltage transmission lines or in certain occupational settings. What makes this research particularly significant is the focus on ACTH cells, which control cortisol production and your body's stress response system. The fact that even one day of exposure produced measurable cellular changes suggests these frequencies can trigger biological stress responses more rapidly than previously understood. The researchers' conclusion that 50 Hz magnetic fields act as a 'stressogenic factor' adds important evidence to the growing body of research showing that EMF exposure isn't biologically neutral, even at non-thermal levels.

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
Rauš Balind S, M. (2016). Manojlović-Stojanoski, V.
Show BibTeX
@article{manojlovi_stojanoski_v_ce4517,
  author = {Rauš Balind S and M.},
  title = {Manojlović-Stojanoski, V},
  year = {2016},
  doi = {10.1002/tox.22059},
  
}
DOI: 10.1002/tox.22059PubMed: 25346405

Quick Questions About This Study

Yes, this study found that 50 Hz magnetic fields at 0.5 mT significantly reduced the number and volume of ACTH cells in rat pituitaries. These cells are essential for producing stress hormones and maintaining the body's stress response system.
Changes occurred remarkably fast - just one day of exposure to 0.5 mT magnetic fields significantly decreased ACTH cell numbers, volumes, and nuclear sizes. This rapid response suggests the pituitary gland is particularly sensitive to this type of EMF.
Rats exposed from conception to 3 months of age showed reduced ACTH cell volumes and smaller pituitary glands. This suggests chronic exposure may cause permanent structural changes to the hormone-producing system that regulates stress responses.
This field strength is found directly under high-voltage power lines and in certain occupational settings. While higher than typical household levels, it represents real-world exposures that utility workers and people living near electrical infrastructure may experience regularly.
Because the magnetic fields damaged ACTH cells, which produce hormones that help your body respond to stress. When these cells are compromised, it can disrupt your natural stress response system, essentially making the EMF itself a source of biological stress.