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

Cellular Effects

Effect of GSM-900 and -1800 signals on the skin of hairless rats. II: 12-week chronic exposures.

No Effects Found

Sanchez S, Masuda H, Billaudel B, Haro E, Anane R, Leveque P, Ruffie G, Lagroye I, Veyret B · 2006

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Cell phone radiation at regulatory levels showed no skin damage in rats after 12 weeks of daily exposure.

Plain English Summary

Summary written for general audiences

French researchers exposed hairless rats to cell phone radiation (GSM-900 and GSM-1800 signals) for 2 hours daily over 12 weeks to study effects on skin health. They found no significant changes in skin thickness, cell growth patterns, or key structural proteins compared to unexposed rats. This suggests that chronic exposure to these specific cell phone frequencies at the tested levels did not cause detectable skin damage in this animal model.

Why This Matters

This study represents important research into the chronic effects of cell phone radiation on skin tissue, using exposure levels (2.5 and 5 W/kg SAR) that bracket the current regulatory limit of 2 W/kg for mobile devices. The 12-week duration provides meaningful insight into long-term exposure effects, though it's worth noting that human cell phone use often spans decades. While these results are reassuring for skin health specifically, they represent just one piece of a much larger puzzle. The science demonstrates varying effects across different biological systems, and studies examining other tissues have found different outcomes. What this means for you is that while this research suggests cell phone radiation may not significantly damage skin tissue at these exposure levels, it doesn't address other potential health effects that research has identified in brain tissue, reproductive health, and cellular function.

Exposure Details

SAR
2.5 and 5 W/kg
Source/Device
GSM-900 or -1800
Exposure Duration
2 h per day, 5 days a week, for 12 weeks

Exposure Context

This study used 2.5 and 5 W/kg for SAR (device absorption):

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: 2.5 and 5 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)This level is 2 times the FCC limit
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

Study Details

The purpose of this work was to determine whether the cellular components of Hairless-rat skin are affected by a chronic local exposure to non-ionizing radiations of Global Mobile Phone System: GSM-900 or -1800 radiations at specific absorption rate (SAR) 2.5 and 5 W/kg.

A selected part of the right back of five-week old female hairless rats was exposed or sham exposed ...

Analyses of skin sections using hematoxylin eosin saffron (HES) coloration showed no significant dif...

The results of this 12-week chronic study do not demonstrate major histological variations in the skin of hairless rats exposed to RFR used in mobile telephony (GSM-900 or -1800).

Cite This Study
Sanchez S, Masuda H, Billaudel B, Haro E, Anane R, Leveque P, Ruffie G, Lagroye I, Veyret B (2006). Effect of GSM-900 and -1800 signals on the skin of hairless rats. II: 12-week chronic exposures. Int J Radiat Biol. 82(9):675-680, 2006.
Show BibTeX
@article{s_2006_effect_of_gsm900_and_3355,
  author = {Sanchez S and Masuda H and Billaudel B and Haro E and Anane R and Leveque P and Ruffie G and Lagroye I and Veyret B},
  title = {Effect of GSM-900 and -1800 signals on the skin of hairless rats. II: 12-week chronic exposures.},
  year = {2006},
  doi = {10.1080/09553000600930087},
  url = {https://www.tandfonline.com/doi/abs/10.1080/09553000600930087},
}
DOI: 10.1080/09553000600930087

Cited By (22 papers)

Quick Questions About This Study

No, French researchers found that 12 weeks of daily GSM-900 and GSM-1800 exposure caused no significant skin damage in hairless rats. Skin thickness, cell growth patterns, and structural proteins remained normal compared to unexposed animals, suggesting chronic exposure at tested levels was safe.
Research shows GSM-1800 frequencies do not affect skin thickness after chronic exposure. A 12-week study exposing hairless rats to GSM-1800 signals for 2 hours daily found no significant changes in skin thickness compared to control groups.
No, daily 2-hour GSM radiation exposure does not change skin cell proliferation markers. Researchers found that Ki-67 protein levels, which indicate cellular growth, remained within normal ranges in rat skin after 12 weeks of GSM-900 and GSM-1800 exposure.
Chronic GSM phone radiation does not affect collagen and elastin levels in skin tissue. A 12-week study found no significant differences in these structural proteins between rats exposed to GSM-900 or GSM-1800 frequencies and unexposed control animals.
Filaggrin, collagen, and elastin proteins remain unchanged after 12 weeks of GSM-900 exposure. French researchers found no significant differences in these key skin structural proteins between exposed and unexposed hairless rats, indicating no detectable protein damage from chronic exposure.