8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body

Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Sleep & Circadian Rhythm

GSM modulated radiofrequency radiation does not affect 6-sulfatoxymelatonin excretion of rats.

No Effects Found

Bakos J, Kubinyi G, Sinay H, Thuroczy G. · 2003

View Original Abstract
Share:

Cell phone-level radiation showed no immediate effects on melatonin production in rats after 14 days of exposure.

Plain English Summary

Summary written for general audiences

Researchers exposed 72 rats to cell phone-type radiation at 900 MHz and 1800 MHz for 2 hours daily over 14 days, then measured melatonin breakdown products in their urine to see if the radiation disrupted their natural sleep hormone production. They found no significant changes in melatonin levels compared to unexposed control rats. This suggests that short-term exposure to these specific radiation levels may not immediately disrupt the body's internal clock or sleep patterns.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 900 MHz Duration: 2 h between 8:00 AM and noon daily during the 14 day exposure

Study Details

In this study, the effect of exposure to 900 and 1800 MHz GSM-like radiofrequency radiation upon the urinary 6-sulfatoxymelatonin (6SM) excretion of adult male Wistar rats was studied.

Seventy-two rats were used in six independent experiments, three of which were done with 900 MHz and...

The combined results of three experiments done with the same frequency were statistically analyzed. ...

Cite This Study
Bakos J, Kubinyi G, Sinay H, Thuroczy G. (2003). GSM modulated radiofrequency radiation does not affect 6-sulfatoxymelatonin excretion of rats. Bioelectromagnetics 24(8):531-534, 2003.
Show BibTeX
@article{j_2003_gsm_modulated_radiofrequency_radiation_2949,
  author = {Bakos J and Kubinyi G and Sinay H and Thuroczy G.},
  title = {GSM modulated radiofrequency radiation does not affect 6-sulfatoxymelatonin excretion of rats.},
  year = {2003},
  doi = {10.1002/bem.10172},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.10172},
}
DOI: 10.1002/bem.10172

Cited By (24 papers)

Quick Questions About This Study

A 2003 study found that cell phone radiation at 900 MHz and 1800 MHz did not affect melatonin production in rats after 14 days of exposure. The researchers measured melatonin breakdown products in urine and found no significant changes compared to unexposed animals.
Research on 72 rats exposed to 900 MHz radiation for 2 hours daily over 14 days showed no disruption to melatonin production. Scientists measured 6-sulfatoxymelatonin in urine and found no statistically significant differences between exposed and control groups.
One study suggests short-term cell phone radiation exposure may not immediately disrupt circadian rhythms. Researchers exposed rats to 900 MHz and 1800 MHz frequencies for 14 days and found no changes in melatonin levels, which regulate the body's internal clock.
A controlled study found no immediate sleep hormone disruption from cell phone-type radiation at 900 MHz and 1800 MHz frequencies. However, this was a short-term animal study, and more research is needed to understand long-term effects on human sleep patterns.
Research measuring melatonin production in rats found no impact from 14 days of radiofrequency exposure at cell phone frequencies. The study examined 900 MHz and 1800 MHz radiation but was limited to short-term exposure in animal subjects.