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Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels.

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Singh S, Mani KV, Kapoor N. · 2015

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Long-term radar exposure at 12.5-18 GHz frequencies significantly disrupted sleep and mood hormones in military workers.

Plain English Summary

Summary written for general audiences

Researchers studied 155 military personnel exposed to radar frequencies of 8-12 GHz and 12.5-18 GHz to measure how electromagnetic fields affect melatonin (the sleep hormone) and serotonin (a mood chemical) in their blood. Workers exposed to the higher frequency range (12.5-18 GHz) showed significantly lower melatonin levels and higher serotonin levels, especially those with more than 10 years of exposure. This suggests that long-term exposure to certain radar frequencies can disrupt the body's natural hormone balance.

Why This Matters

This study provides compelling evidence that occupational EMF exposure can disrupt fundamental biological processes, specifically the delicate balance of hormones that regulate sleep and mood. The finding that higher frequency radar (12.5-18 GHz) produced significant hormonal changes while lower frequencies (8-12 GHz) did not suggests a frequency-dependent biological response. What makes this research particularly relevant is that these radar frequencies overlap with those used in 5G networks and airport security scanners that millions encounter daily. The fact that effects were most pronounced in workers with over 10 years of exposure points to cumulative biological impact over time. While most people aren't exposed to radar occupationally, this study adds to the growing body of evidence that EMF can measurably alter human physiology, challenging the industry narrative that non-ionizing radiation is biologically inert.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 12 GHz - 18 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 12 GHz - 18 GHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 8-12 GHz and 12.5-18 GHz

Study Details

To delineate the effect of chronic electromagnetic field (EMF) exposure from radar on plasma melatonin and serotonin levels in occupationally exposed military personnel.

A total of 166 male military personnel participated in the study out of which only 155 joined for bl...

The group I exposed population registered a minor though not significant decrease in plasma melatoni...

The study showed the EMF ability to influence plasma melatonin and serotonin concentration in radar workers, significantly in 12.5-18 GHz range with service period greater than 10 years.

Cite This Study
Singh S, Mani KV, Kapoor N. (2015). Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels. Int J Radiat Biol.2015 May;91(5):426-34.
Show BibTeX
@article{s_2015_effect_of_occupational_emf_2601,
  author = {Singh S and Mani KV and Kapoor N. },
  title = {Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels.},
  year = {2015},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/25565559/},
}
PubMed: 25565559

Cited By (22 papers)

Quick Questions About This Study

Yes, radar exposure can disrupt sleep hormones. A 2015 study of 155 military personnel found that workers exposed to higher frequency radar (12.5-18 GHz) showed significantly lower melatonin levels, especially after 10+ years of exposure. This suggests radar can interfere with your body's natural sleep regulation.
Research shows radar radiation can lower melatonin levels. Military workers exposed to 12.5-18 GHz radar frequencies had significantly reduced melatonin concentrations in their blood compared to unexposed controls. The effect was most pronounced in personnel with over 10 years of occupational exposure.
High frequency radar appears harmful to sleep regulation. A study found that exposure to 12.5-18 GHz radar significantly decreased melatonin, the hormone that controls your sleep-wake cycle. Workers with longer exposure periods showed the greatest disruption to their natural hormone balance.
Radar exposure can significantly increase serotonin levels in your blood. Military personnel exposed to 12.5-18 GHz radar showed highly elevated serotonin concentrations compared to unexposed workers. This hormonal imbalance occurred alongside decreased melatonin levels, particularly after 10+ years of exposure.
Radar exposure poses risks to hormone balance, particularly melatonin and serotonin regulation. Research on military radar workers found that higher frequency exposure (12.5-18 GHz) significantly lowered sleep-promoting melatonin while raising serotonin levels, especially with prolonged occupational exposure over 10 years.