Exposure to Low-Level Magnetic Fields may Damage Brain Cells

March 5, 2004

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

Dr. Mercola's Comment:

Previous studies have also found that magnetic fields may cause cancer, and

there is no question that exposure to electromagnetic fields should be avoided

as much as possible. The practical issue is to determine how to avoid it.

Ideally, it would be best to have a gauss meter and measure the fields around

you.

Generally, you should try to keep exposures as low as possible. Ideally, your

sleeping environment and regular sitting places should be less than 0.3

milligauss. This is especially important for pregnant women, as exposures could

be damaging to the developing child.

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