Magnet Therapy
"I know of no scientist who takes this claim
seriously...It's another fad. They come and go like copper bracelets
and crystals and all
of these things, and this one will pass too." --Robert Park of the
American Physical Society.
"Iron atoms in a magnet are crammed
together in a solid state about one atom apart from one another. In your
blood only four iron atoms are allocated to each hemoglobin molecule, and
they are separated by distances too great to form a magnet. This is easily
tested by pricking your finger and placing a drop of your blood next to a
magnet. " --Michael Shermer
Magnet therapy is a type of "alternative" medicine
which claims that magnetic fields have healing powers. Some claim that
magnets can help
broken bones heal faster, but most of the advocacy comes from those who
claim that magnets
relieve pain. Most of the support for these notions is in the form of
testimonials and anecdotes, and can be attributed to
"placebo effects and other effects accompanying their use"
(Livingston 1998).
The main basis for the claims is a double-blind test study, conducted
at Baylor College of Medicine in Houston, which compared the effects of
magnets and sham magnets on knee pain. The study involved 50 adult patients
with pain related to having been infected with the polio virus when they
were children. A static magnetic device or a placebo device was applied
to the patient's skin for 45 minutes. The patients were asked to rate
how much pain they experienced when a "trigger point was touched."
The researchers reported that the 29 patients exposed to the magnetic
device achieved lower pain scores than did the 21 who were exposed to
the placebo device. Although this study is cited by nearly everyone
selling magnets, it provides no legitimate basis for concluding that
magnets offer any health-related benefit:
A less publicized experiment found that
magnets did not have any effect on healing heel pain. Over a 4-week period,
19 patients wore a molded insole containing a magnetic foil, while 15 patients
wore the same type of
insole with no magnetic foil. In both groups, 60% reported improvement.
Despite the fact that there has been virtually no scientific testing of
magnet therapy, a growing industry is producing magnetic bracelets, bands,
insoles, back braces, mattresses, etc., and claiming miraculous powers
for their products. The magnet market may
be approaching $150 million annually (Collie). (Lerner claims that U.S.
sales are near the half billion mark and that world-wide magnetic therapy is
bringing in nearly twice as much.)
If it works for you, you can buy them in many places.
|