Local vasodilator response to mobile phones.
Paredi P, Kharitonov SA, Hanazawa T, Barnes PJ · 2001
View Original AbstractCell phone radiation causes immediate tissue heating and blood vessel changes during 30-minute calls, effects that disappear with hands-free use.
Plain English Summary
Researchers measured how 30-minute cell phone conversations affected nasal passages and skin temperature in 11 healthy adults. They found that the phone side of the face heated up by over 2 degrees Celsius, nasal passages narrowed by 27%, and nitric oxide levels increased, indicating blood vessel dilation. These effects disappeared when participants used a hands-free earpiece, proving the electromagnetic field was the cause.
Why This Matters
This study provides clear evidence that cell phone radiation produces immediate, measurable biological effects in human tissue. The 2.3-degree temperature increase and 27% reduction in nasal airway area demonstrate that 900 MHz radiation penetrates tissue and triggers vascular responses within minutes of exposure. What makes this research particularly compelling is the control element: when participants used earpieces to avoid direct EMF exposure, these effects vanished entirely. The science demonstrates that these aren't psychological effects or coincidences, but direct biological responses to electromagnetic fields. While the researchers focused on acute effects during a single 30-minute call, the reality is that many people spend hours daily with phones pressed against their heads. The vasodilation response they documented suggests your body is actively responding to this radiation exposure every time you take a call without a hands-free device.
Exposure Information
Specific exposure levels were not quantified in this study. The study examined exposure from: 900 MHz Duration: 30-minute telephone conversation
Study Details
We investigated if a mobile telephone conversation can modify skin temperature, NO, and nasal resistance.
We studied the effect of an EMF (900 MHz) generated by a commercially available cellular phone durin...
There was a similar and significant increase in skin temperature of the nostril and occipital area o...
Exposure to EMF produced by a mobile phone produces biological effects that can be easily measured. Microwaves may increase skin temperature and therefore cause vasodilation and reduce MCA. Further studies are needed to study the long-term effects of mobile phone use and the relation among NO production, vasodilation, and temperature.
Show BibTeX
@article{p_2001_local_vasodilator_response_to_1697,
author = {Paredi P and Kharitonov SA and Hanazawa T and Barnes PJ},
title = {Local vasodilator response to mobile phones.},
year = {2001},
doi = {10.1097/00005537-200101000-00027},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1097/00005537-200101000-00027},
}