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Variations of melatonin and stress hormones under extended shifts and radiofrequency electromagnetic radiation.

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Vangelova KK, Israel MS. · 2005

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Higher radiofrequency radiation exposure significantly increased stress hormones in workers, showing the body treats RF as a biological stressor.

Plain English Summary

Summary written for general audiences

Researchers measured stress hormones in 36 male operators working at broadcasting stations, TV stations, and satellite stations with different levels of radiofrequency radiation exposure. Workers exposed to higher RF levels (broadcasting station operators) showed significantly elevated levels of stress hormones including cortisol, adrenaline, and noradrenaline compared to those with lower exposure. This suggests that occupational RF radiation exposure may trigger biological stress responses in the body.

Why This Matters

This study provides important evidence that radiofrequency radiation can trigger measurable stress responses in the human body. The researchers found a clear dose-response relationship - the higher the RF exposure, the greater the stress hormone elevation. What makes this particularly relevant is that the highest exposures (averaging 3.1 μW/cm² with peaks of 137 μW/cm²) are within ranges that workers and the public can encounter from various RF sources today. The fact that these biological changes occurred in real-world occupational settings, not just laboratory conditions, strengthens the evidence that RF radiation acts as a biological stressor. The science demonstrates that our bodies recognize and respond to RF radiation exposure, even when we're not consciously aware of it.

Exposure Details

Power Density
0.00189, 0.0031,0.00524, 0.137 µW/m²

Exposure Context

This study used 0.00189, 0.0031,0.00524, 0.137 µW/m² for radio frequency:

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: 0.00189, 0.0031,0.00524, 0.137 µW/m²Extreme Concern - 1,000 uW/m2FCC Limit - 10M uW/m2Effects observed in the No Concern rangeFCC limit is 5,291,005,291x higher than this level

Study Details

The aim of this study is to investigate Variations of melatonin and stress hormones under extended shifts and radiofrequency electromagnetic radiation.

We studied the time-of-day variations in urinary levels of 6-sulphatoxy-melatonin and three stress h...

Measuring the time-weighted average (TWA) of EMR exposure revealed a high-level of exposure in broad...

In conclusion, the excretion of 6-sulphatoxymelatonin retained a typical diurnal pattern under fast-rotating extended shifts and radiofrequency EMR, but showed an exposure-effect relation with stress hormones.

Cite This Study
Vangelova KK, Israel MS. (2005). Variations of melatonin and stress hormones under extended shifts and radiofrequency electromagnetic radiation. Rev Environ Health. 20(2):151-161, 2005.
Show BibTeX
@article{kk_2005_variations_of_melatonin_and_1405,
  author = {Vangelova KK and Israel MS.},
  title = {Variations of melatonin and stress hormones under extended shifts and radiofrequency electromagnetic radiation.},
  year = {2005},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/16121836/},
}
PubMed: 16121836

Cited By (14 papers)

Quick Questions About This Study

Yes, a 2005 study of broadcasting workers found that higher radiofrequency radiation exposure significantly increased stress hormones including cortisol, adrenaline, and noradrenaline. Workers at broadcasting stations with the highest RF exposure showed the most elevated hormone levels compared to those with lower exposure.
Research shows EMF exposure can increase cortisol levels. A study of radio station operators found that workers exposed to higher radiofrequency radiation had significantly elevated cortisol excretion rates, with levels correlating directly to their radiation exposure amounts throughout their shifts.
Studies suggest radiofrequency radiation may trigger your body's stress response system. Broadcasting station workers exposed to higher RF levels showed significantly increased stress hormones including cortisol, adrenaline, and noradrenaline, indicating their bodies were responding as if under biological stress.
RF radiation appears to stimulate stress hormone production in exposed workers. A 2005 occupational study found that higher radiofrequency exposure levels led to significantly increased excretion of cortisol, adrenaline, and noradrenaline, while melatonin patterns remained unchanged.
Broadcasting station radiation exposure triggers measurable biological stress responses. Workers at these facilities showed significantly elevated stress hormones including cortisol, adrenaline, and noradrenaline compared to workers with lower radiation exposure, suggesting the body recognizes RF as a stressor.