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Radiofrequency fields, transthyretin, and Alzheimer's disease

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Söderqvist F, Hardell L, Carlberg M, Mild KH · 2010

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Cell phone radiation at typical exposure levels increased brain-protective proteins, suggesting complex biological responses beyond simple harm.

Plain English Summary

Summary written for general audiences

Researchers exposed 41 people to cell phone radiation for 30 minutes and found it increased levels of transthyretin (TTR), a protein that helps protect the brain from Alzheimer's disease by clearing harmful plaques. In a separate study of 313 people, longer-term phone use was also linked to higher TTR levels. This suggests cell phone radiation might actually trigger a protective response in the brain against Alzheimer's disease.

Why This Matters

This study presents a fascinating paradox in EMF research. While most studies focus on potential harm from radiofrequency exposure, this research suggests cell phone radiation might trigger protective mechanisms against Alzheimer's disease. The exposure level used (1.0 W/kg SAR) is within typical cell phone ranges, making these findings directly relevant to everyday phone use. However, we must interpret these results carefully. The fact that EMF exposure appears to increase a protective protein doesn't necessarily mean the exposure itself is beneficial. The reality is that our bodies often mount protective responses to stressors, and this TTR increase could represent a stress response rather than a health benefit. What this means for you is that EMF effects on the brain are far more complex than simple harm or benefit categories suggest, and we need much more research to understand the full implications of chronic low-level exposure.

Exposure Details

SAR
1 W/kg
Source/Device
890-MHz GSM
Exposure Duration
30 min

Exposure Context

This study used 1 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: 1 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 890 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 890 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

Based on our studies on humans on RF from wireless phones, we propose that transthyretin (TTR) might explain the findings.

In a cross-sectional study on 313 subjects, we used serum TTR as a marker of cerebrospinal fluid TT...

In a provocation study on 41 persons exposed for 30 min to an 890-MHz GSM signal with specific absor...

We propose that TTR might be involved in the findings of RF exposure benefit in AD mice.

Cite This Study
Söderqvist F, Hardell L, Carlberg M, Mild KH (2010). Radiofrequency fields, transthyretin, and Alzheimer's disease J Alzheimers Dis. 20(2):599-606, 2010.
Show BibTeX
@article{f_2010_radiofrequency_fields_transthyretin_and_122,
  author = {Söderqvist F and Hardell L and Carlberg M and Mild KH},
  title = {Radiofrequency fields, transthyretin, and Alzheimer's disease},
  year = {2010},
  
  url = {https://content.iospress.com/articles/journal-of-alzheimers-disease/jad01395},
}

Quick Questions About This Study

Yes, a 2010 study found that 30 minutes of 890 MHz GSM exposure at 1.0 W/kg significantly increased transthyretin (TTR) levels in blood. TTR is a protective protein that helps clear Alzheimer's-related plaques from the brain, suggesting cell phone radiation may trigger beneficial brain protection mechanisms.
Research suggests it might. A study by Söderqvist and colleagues found that 890 MHz GSM radiation increased transthyretin, a protein that removes harmful brain plaques associated with Alzheimer's. The researchers propose this protective response could explain why some studies show RF exposure benefits in Alzheimer's disease mice models.
Transthyretin levels increased within 60 minutes after 30 minutes of 890 MHz GSM exposure in the 2010 study. This relatively quick response suggests the brain rapidly activates protective mechanisms when exposed to radiofrequency radiation, potentially as a defense against cellular damage.
The study found that 1.0 Watt per kilogram (W/kg) SAR from 890 MHz GSM radiation significantly increased transthyretin levels. This SAR level is within typical cell phone exposure ranges, suggesting that normal phone use may be sufficient to trigger this protective protein response in the brain.
Yes, the researchers found that people with longer-term phone use had higher transthyretin levels in their cross-sectional study of 313 participants. This suggests that chronic exposure to cell phone radiation may maintain elevated levels of this Alzheimer's-protective protein over time.