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Oxidative Stress215 citations

Effects of 900-MHz electromagnetic field emitted from cellular phone on brain oxidative stress and some vitamin levels of guinea pigs.

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Meral I, Mert H, Mert N, Deger Y, Yoruk I, Yetkin A, Keskin S · 2007

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Cell phone radiation at typical usage levels creates oxidative stress in brain tissue, depleting natural antioxidant defenses.

Plain English Summary

Summary written for general audiences

Researchers exposed guinea pigs to cell phone radiation (900 MHz) for 12 hours daily over 30 days and found significant oxidative stress in brain tissue. The radiation increased harmful compounds called free radicals while depleting the brain's natural antioxidant defenses. This suggests that prolonged cell phone exposure may damage brain cells through oxidative stress, the same process linked to aging and neurodegenerative diseases.

Why This Matters

This study provides compelling evidence that cell phone radiation creates oxidative stress in brain tissue at exposure levels comparable to heavy phone use. The guinea pigs were exposed to a SAR of 0.95 W/kg, which is just under the 2 W/kg safety limit set by most regulatory agencies. What's particularly concerning is that the researchers found decreased glutathione and catalase activity in the brain - these are your body's primary defenses against cellular damage from free radicals. The science demonstrates that this isn't just about heating effects, but about fundamental disruption of cellular chemistry. While the researchers appropriately call for more studies, the oxidative stress pathway they've documented here connects to a growing body of evidence linking EMF exposure to neurological concerns. The reality is that your brain doesn't distinguish between 'safe' and 'unsafe' levels of exposure when cellular damage is occurring.

Exposure Details

SAR
0.95 W/kg
Source/Device
890- to 915-MHz
Exposure Duration
12 h/day (11-h 45-min stand-by and 15-min spiking mode) for 30 days

Exposure Context

This study used 0.95 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: 0.95 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 2x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 915 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 915 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

This study was designed to demonstrate the effects of 900-MHz electromagnetic field (EMF) emitted from cellular phone on brain tissue and also blood malondialdehyde (MDA), glutathione (GSH), retinol (vitamin A), vitamin D(3) and tocopherol (vitamin E) levels, and catalase (CAT) enzyme activity of guinea pigs.

Fourteen male guinea pigs, weighing 500-800 g were randomly divided into one of two experimental gro...

It was found that the MDA level increased (P<0.05), GSH level and CAT enzyme activity decreased (P<0...

It was concluded that electromagnetic field emitted from cellular phone might produce oxidative stress in brain tissue of guinea pigs. However, more studies are needed to demonstrate whether these effects are harmful or/and affect the neural functions.

Cite This Study
Meral I, Mert H, Mert N, Deger Y, Yoruk I, Yetkin A, Keskin S (2007). Effects of 900-MHz electromagnetic field emitted from cellular phone on brain oxidative stress and some vitamin levels of guinea pigs. Brain Res1169:120-124, 2007.
Show BibTeX
@article{i_2007_effects_of_900mhz_electromagnetic_1201,
  author = {Meral I and Mert H and Mert N and Deger Y and Yoruk I and Yetkin A and Keskin S},
  title = {Effects of 900-MHz electromagnetic field emitted from cellular phone on brain oxidative stress and some vitamin levels of guinea pigs.},
  year = {2007},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/17674954/},
}
PubMed: 17674954

Cited By (215 papers)

View all 215 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, a 2007 study found that 900 MHz cell phone radiation caused significant brain damage in guinea pigs after 12 hours daily exposure for 30 days. The radiation increased harmful free radicals while depleting natural antioxidant defenses, suggesting oxidative stress damage to brain tissue.
Research on guinea pigs showed that 12 hours of daily 900 MHz cell phone radiation exposure for 30 days caused measurable brain oxidative stress. The study found increased free radicals and decreased protective antioxidants like glutathione in brain tissue after this prolonged exposure period.
No, the 2007 guinea pig study found that 30 days of 900 MHz cell phone radiation exposure did not change brain levels of vitamins A, E, or D3. However, the same radiation did significantly alter these vitamin levels in blood samples.
Guinea pigs exposed to 900 MHz cell phone radiation for 30 days showed decreased glutathione levels and reduced catalase enzyme activity in brain tissue. These antioxidant reductions occurred alongside increased free radical damage, indicating compromised cellular protection against oxidative stress.
Yes, 900 MHz radiation affected blood and brain differently in guinea pigs. While brain vitamin levels remained unchanged, blood showed increased vitamins A, D3, and E plus higher catalase activity. Both tissues experienced oxidative stress but with distinct response patterns.