Top Health Today: Do Cell
Phones Really Cause Brain Cancers
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Cell Phone Radiation Protection
March 29, 2012
The cell phone today is more ubiquitous than ever, and
scientific studies continue to try to distinguish the
relationship between cellular phones and cancer.
A recent study from the National Institutes of Health showed
increased brain activity in participants exposed to
cell
phone radiation. The study used PET scans to measure the
brain's sugar level, and found increased activity in regions
closest to the phone's antenna after 50 minutes of exposure.
Although the increased activity isn't directly linked to
harmful effects, the human brain's evident sensitivity to
the phone's electromagnetic waves does raise further
questions.
In May 2011, the World Health Organization reclassified cell
phone radiation exposure as "possibly carcinogenic," a label
that places it in the same category as chloroform and lead.
The most extensive case control study of cellular phones and
cancer, the Interphone study, conducted across 13 countries
for a decade found that the highest grade of mobile phone
users-those who used their phones for 30 minutes a day over
10 years or more- were twice as likely to develop glioma, a
malignant brain tumor. These results are alarming,
particularly because the study failed to take into account
that children and young adults are far more susceptible to
cell phone radiation than adults.
Cellular phone radiation testing conducted by manufacturers
also underestimates the amount of radiation that users are
exposed to. A recent paper published in the journal
Electromagnetic Biology and Medicine revealed that industry
testing is done on a mannequin modeled after a 6'2", 200
pound man with the phone held one inch from the mannequin's
ear. The study estimates that 97 percent of the population
deviate from this unrealistic model of usage and experience
greater exposure.
The Federal Communications Commission requires a mobile
phone to have a Specific Absorption Rate (SAR), a measure of
the peak of electromagnetic radiation level in a model, of
less than 1.6 watts per kilogram. However, the peak SAR may
not represent the actual SAR levels of a typical phone call.
A cellular phone with a lower SAR may expose the user to
more radiation on average than one with a higher SAR. A
study conducted by a bioengineering research professor, Dr.
Henry Lai, found effects of memory loss in rats exposed to
SAR levels as low 0.0006 to 0.06 watts per kilogram.
As of 2010, there are over 223 million mobile phone users in
the US over the age of 13 and the numbers are constantly
growing. According to the CTIA, the Wireless Association,
the total minutes of cell phone use in America in 2009 was
2.3 trillion minutes. Cellular phone users are also starting
at younger ages. Given the indispensable role of cell phones
in our lives and the increasing concern about an association
between cell phone use and cancer, regulatory agencies
should carry out more thorough investigations, and cell
phone users should exercise caution and take steps to lower
their exposure to cell phone radiation.
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