| Researchers
suggest that people should do what they can to limit their exposure
to low-level magnetic fields like those emitted by blow dryers,
razors, electric blankets, ovens, coffee makers and clocks after
finding that prolonged exposure can damage brain cell DNA in
rats. Even brief exposures could pose a problem, as it appears
the damage builds up over time.
Although traditionally it has been believed that low-level
magnetic fields were not harmful, in the study rats exposed
to a 60-hertz field, such as that emitted by common household
appliances, for 24 hours had significant DNA damage. Those
exposed for 48 hours had even greater damage and both groups
experienced an increase in "cell suicide," in which
a cell self-destructs because it cannot repair itself.
Rather than causing direct harm, researchers believe the
magnetic fields create subtle changes that lead to damage
and an increase in damaging free radicals that attack the
cell. Drugs given to the rats to neutralize free radicals
before being exposed to the magnetic fields were able to effectively
protect the rats' brain cell DNA from damage.
Researchers concluded that people need to be aware of the
potential harm of low-level magnetic fields, as so many electrical
devices that we use daily emit them. Further, people should
limit their exposure as much as possible, especially in regard
to electrical appliances that are held close to the body,
such as razors and electric blankets.
Environmental
Health Science Perspectives January 26, 2004
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