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Omega-3 May Also Protect Against
Hearing Loss According To New Study
New Omega-3 Research Sheds New Light on These Nutritional
Lipids and Oils For Their Beneficial Roles in Supporting
Cardiovascular Health, Cognitive and Mental Function.
Increased intakes of omega-3 fatty acids, and the fish that provide
them, may reduce the risk of age-related hearing loss, says a new
study from the University of Sydney, Australia.
At least two servings of fish per week was associated with a
42 per cent reduction in the risk of hearing loss in over 50 year-olds,
compared with people who average less than one serving per week,
according to findings published in the American Journal of Clinical
Nutrition.
Similar reductions were observed with intakes of long-chain omega-3
fatty acids, with increasing intakes associated with 14 per cent
reductions in the risk of age-related hearing loss (presbycusis).
“Dietary intervention with omega-3 polyunsaturated fatty acids could
prevent or delay the development of age-related hearing loss,” wrote
the researchers.
Hearing loss is the most common sensory disorder in the United
States, affecting more than 36 million people.
Other micro-nutrients have been linked to reducing the risk of
age-related hearing loss. In 2007 scientists from Wageningen
University reported that Folic Acid supplements delayed age-related
hearing loss in the low frequency region in a study of 728 men and
women between the ages of 50 and 70 (Annals of Internal Medicine,
Vol. 146, pp. 1-9).
Another study, published earlier this year indicated a role for beta
carotene and vitamins C and E, and the mineral Magnesium in
preventing prevent both temporary and permanent hearing loss.
The laboratory-controlled study was presented at the Association
for Research in Otolaryngology’s annual conference in Baltimore
in February 2009.
The University of Sydney researchers analyzed data from 2,956
participants of the Blue Mountains Hearing Study. Dietary intakes
of fish, and the omega-3s they contain, using food-frequency
questionnaires.
Results showed an inverse association between total and long-chain
omega-3 intakes and hearing loss, while increasing fish intakes also
indicated a reduction in the risk of presbycusis, said the researchers.
Correlation is not causation, however, and significant further research
is planned, including human intervention trials.
Omega-3 fatty acids, most notably EPA (eicosapentaenoic acid)
and DHA (docosahexaenoic acid), have been linked to a wide-range
of health benefits, including reduced risk of cardiovascular disease
(CVD) and certain cancers, good development of a baby during
pregnancy, joint health, and improved behavior and mood.
Source: American Journal of Clinical Nutrition
Published online
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