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

Blood-brain barrier disruption by continuous-wave radio frequency radiation

Bioeffects Seen

Sirav B, Seyhan N · 2009

View Original Abstract
Share:

Twenty minutes of cell phone radiation made the blood-brain barrier more permeable in male rats at exposure levels comparable to phone calls.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 900 MHz cell phone radiation for 20 minutes and found it made the blood-brain barrier more permeable in males but not females. This protective brain barrier normally keeps toxins out, suggesting cell phone radiation might compromise brain protection.

Why This Matters

This study adds to a growing body of evidence showing that radiofrequency radiation can compromise the blood-brain barrier, your brain's critical defense system against toxins and pathogens. What makes this research particularly significant is that it used power densities (12.8 mW/cm²) that are within range of what you might experience during a phone call held close to your head. The finding that only male rats were affected highlights an important gap in our understanding of how biological sex influences EMF sensitivity. The reality is that a compromised blood-brain barrier isn't just an academic concern - it potentially allows harmful substances to reach brain tissue that would normally be protected. While the researchers appropriately call for more studies, the precautionary principle suggests we shouldn't wait for definitive proof before taking reasonable steps to reduce our exposure, especially given that similar blood-brain barrier effects have been documented in other independent studies.

Exposure Details

Power Density
12.8 µW/m²
Source/Device
900 MHz
Exposure Duration
20 min
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

This study was designed to investigate the effects of 900 and 1,800 MHz Continuous Wave Radio Frequency Radiation (CW RFR) on the permeability of Blood Brain Barrier (BBB) of rats.

Results have shown that 20 min RFR exposure of 900 and 1,800 MHz induces an effect and increases the...

More studies are needed to demonstrate the effects of RFR on the permeability of BBB and the mechanisms of that breakdown.

Cite This Study
Sirav B, Seyhan N (2009). Blood-brain barrier disruption by continuous-wave radio frequency radiation Electromagn Biol Med. 28:215-222, 2009.
Show BibTeX
@article{b_2009_bloodbrain_barrier_disruption_by_182,
  author = {Sirav B and Seyhan N},
  title = {Blood-brain barrier disruption by continuous-wave radio frequency radiation},
  year = {2009},
  doi = {10.1080/15368370802608738},
  url = {https://www.tandfonline.com/doi/abs/10.1080/15368370802608738},
}
DOI: 10.1080/15368370802608738

Cited By (43 papers)

Quick Questions About This Study

Yes, a 2009 study found that 20 minutes of 900 MHz cell phone radiation increased blood-brain barrier permeability in male rats. This protective brain barrier normally keeps toxins out, suggesting cell phone radiation might compromise brain protection in males specifically.
Research by Sirav and Seyhan found that 900 MHz radiation increased blood-brain barrier permeability only in male rats, not females. The study didn't explain why this gender difference occurs, highlighting the need for more research on sex-specific EMF effects.
A 2009 rat study suggests it might. Researchers found that just 20 minutes of 900 MHz radiation exposure made the blood-brain barrier more permeable in males, potentially allowing toxins easier access to brain tissue that's normally protected.
Cell phone radiation may weaken the blood-brain barrier, your brain's natural defense system. A study using 900 MHz frequencies found increased barrier permeability in male rats after 20 minutes of exposure, though female rats showed no changes.
No, the research remains inconclusive. While the 2009 Sirav-Seyhan study found that 900 MHz radiation increased blood-brain barrier permeability in male rats, the authors emphasized that more studies are needed to understand these effects and their mechanisms.