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Subjective symptoms among mobile phone users--a consequence of absorption of radiofrequency fields?

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Wilén J, Sandström M, Hansson Mild K · 2003

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Mobile phones with SAR values above 0.5 W/kg increase symptom reports, yet many current phones exceed this threshold.

Plain English Summary

Summary written for general audiences

Researchers studied 2,402 mobile phone users to see if radiation absorption levels (SAR) correlated with symptoms like headaches and fatigue. They found that phones with SAR values above 0.5 watts per kilogram, especially when used for long calling times, were associated with increased symptom reporting. This suggests that the amount of radiation your phone emits into your head may directly influence how you feel after using it.

Why This Matters

This study represents a critical piece of evidence linking specific absorption rates to real-world health symptoms. The researchers didn't just look at whether people used phones, but actually measured how much radiation different phone models delivered to users' heads and correlated this with symptom reports. What makes this particularly significant is the 0.5 W/kg threshold they identified - many phones on the market today exceed this level, with some reaching the legal limit of 2.0 W/kg. The reality is that current safety standards focus on preventing tissue heating, not the subtler biological effects this research suggests occur at much lower levels. You don't have to wait for regulators to catch up to this science - you can check your phone's SAR rating in its settings and consider it as one factor when choosing your next device.

Exposure Details

SAR
>0.5 W/kg

Exposure Context

This study used >0.5 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: >0.5 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 3x higher than this level

Study Details

In this extrapolative study, we have selected 2402 people from the epidemiological study who used any of the four most common GSM MP.

We used the information about the prevalence of symptoms, calling time per day, and number of calls ...

The results indicates that SAR values >0.5 W/kg may be an important factor for the prevalence of som...

Cite This Study
Wilén J, Sandström M, Hansson Mild K (2003). Subjective symptoms among mobile phone users--a consequence of absorption of radiofrequency fields? Bioelectromagnetics. 24(3):152-159, 2003.
Show BibTeX
@article{j_2003_subjective_symptoms_among_mobile_500,
  author = {Wilén J and Sandström M and Hansson Mild K},
  title = {Subjective symptoms among mobile phone users--a consequence of absorption of radiofrequency fields?},
  year = {2003},
  doi = {10.1002/bem.10101},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.10101},
}
DOI: 10.1002/bem.10101

Cited By (49 papers)

View all 49 citing papers on Semantic Scholar

Quick Questions About This Study

Research suggests it can. A 2003 study of 2,402 mobile phone users found that phones emitting radiation above 0.5 watts per kilogram were associated with increased headaches and fatigue, especially with longer daily calling times.
Yes, according to research findings. The 2003 study showed that mobile phones with SAR values above 0.5 W/kg correlated with more symptom reports, particularly when combined with extended daily phone conversations.
Studies indicate it may be problematic. Research on 2,402 users found phones with SAR levels exceeding 0.5 watts per kilogram were linked to increased symptoms like headaches and fatigue during extended use.
Research identifies potential symptom risks. A large 2003 study found that phones emitting over 0.5 W/kg of radiation were associated with increased reports of headaches and fatigue, especially with longer calling times.
Studies show measurable effects on symptoms. Research involving 2,402 users demonstrated that higher radiation levels (above 0.5 W/kg SAR) correlated with increased headaches and fatigue, particularly during extended phone conversations.