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Vitamins
Combat Age-Related Blindness
Hundreds of thousands
of people could benefit from vitamin supplements shown to help
prevent macular degeneration, a condition that is the leading
cause of blindness from age 65, according to a new study.
In 2001, researchers reported they
had found a reduced risk of advanced age-related macular degeneration
and vision loss for test subjects who had been given high-dose
antioxidant supplements -- vitamins C, E and beta carotene --
as well as zinc or zinc oxide.
Researchers at the Johns Hopkins
Medical Institutions in Baltimore tried to estimate how many people
in the United States alone would benefit from increasing supplement
use.
They concluded there are 8 million
Americans at least 55 years old thought to be at high risk for
the problem. If all the people at risk took the supplements used
in the earlier study, more than 300,000 of them would avoid advanced
macular degeneration and any associated vision loss during the
next five years, the study said.
"If even half of the individuals
at high risk for (the condition) were identified and compliant
with the recommended supplement, it is likely that more than 150,000
individuals would avoid vision loss for some time," said the study
published in the November issue of the Archives of Ophthalmology.
"These data suggest that the recommendation
of such a supplement for these individuals should have a major
impact on them as well as on the public health," the authors concluded.
In an editorial commenting on the
study published in the same journal, Lee Jampol, a physician at
the Northwestern University Feinberg School of Medicine in Chicago,
said the supplements should be used "only in patients with intermediate
or advanced age-related macular degeneration."
"What about patients who have a
strong family history of macular degeneration or who for other
reasons believe that they are at risk for the disease and wish
to take the (supplement) formulation prior to the development"
of intermediate or advances cases of the problem, he asked.
"It appears appropriate to eat
a diet rich in fruits and (especially green) vegetables, to supplement
with a multivitamin and to undergo periodic ophthalmic examinations
for the development of" the condition, he added.
Reference
Source 89
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