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Sleep & Circadian Rhythm

The excretion of 6-hydroxymelatonin sulfate in healthy young men exposed to electromagnetic fields emitted by cellular phone -- an experimental study.

No Effects Found

Bortkiewicz A, Pilacik B, Gadzicka E, Szymczak W. · 2002

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One-hour cell phone exposure at typical SAR levels showed no immediate effect on melatonin production in this small study.

Plain English Summary

Summary written for general audiences

Researchers exposed 9 healthy young men to cell phone radiation for one hour while measuring melatonin levels through urine tests. Melatonin is a hormone that regulates sleep and circadian rhythms. The study found no significant changes in melatonin production after exposure to 900 MHz radiation at 1.23 W/kg SAR, suggesting that typical cell phone use may not disrupt sleep hormones.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 217 Hz - 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 217 Hz - 900 MHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

The study examined exposure from: 900 MHz, pulsed with 217 Hz Duration: 60 min. exposure

Study Details

The present study sought to evaluate possible effect of the exposure to EMF emitted by cellular phone on 6-hydroxymelatonin sulfate (6-OHMS) excretion, which reflects melatonin levels in blood.

The examined group consisted of 9 healthy males aged 19-29 years. The experiment was performed under...

Mean 6-OHMS level in both experiments did not differ significantly for any of the respective time po...

The results of our investigation has demonstrated that EMF emitted by cellular phones has no distinct influence on the melatonin level.

Cite This Study
Bortkiewicz A, Pilacik B, Gadzicka E, Szymczak W. (2002). The excretion of 6-hydroxymelatonin sulfate in healthy young men exposed to electromagnetic fields emitted by cellular phone -- an experimental study. Neuroendocrinol Lett 23 Suppl 1:88-91, 2002.
Show BibTeX
@article{a_2002_the_excretion_of_6hydroxymelatonin_2958,
  author = {Bortkiewicz A and Pilacik B and Gadzicka E and Szymczak W.},
  title = {The excretion of 6-hydroxymelatonin sulfate in healthy young men exposed to electromagnetic fields emitted by cellular phone -- an experimental study.},
  year = {2002},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/12019359/},
}
PubMed: 12019359

Cited By (21 papers)

Quick Questions About This Study

A 2002 study found no significant changes in melatonin production after exposing 9 healthy young men to 900 MHz cell phone radiation for one hour. Researchers measured melatonin metabolites in urine and detected no disruption to sleep hormone levels at 1.23 W/kg SAR.
Research testing 217 Hz pulsed EMF from cellular phones found no distinct influence on melatonin levels in healthy young adults. The study monitored circadian variations of 6-hydroxymelatonin sulfate and detected normal patterns despite electromagnetic field exposure during testing periods.
A controlled study exposing participants to 1.23 W/kg SAR from 900 MHz radiation found no significant effects on melatonin production. Researchers concluded that this typical cell phone exposure level does not appear to disrupt the body's natural sleep hormone regulation.
Urine analysis measuring 6-hydroxymelatonin sulfate showed no significant differences before and after one-hour cell phone exposure in young men. The biomarker testing revealed that normal circadian melatonin patterns remained intact despite electromagnetic field exposure from mobile devices.
A study specifically testing 9 healthy young men found no melatonin disruption from one-hour 900 MHz cell phone exposure. The research suggests that brief electromagnetic field exposure may not significantly affect sleep hormone production in this demographic group.