Benefits
Of A Daily Fish Meal As Part Of A Weight Loss Diet
Among the established health benefits of a diet rich in
n-3 fatty acids (found in ocean fish as well as in flaxseed
oil) is its protective effect aginst cardiovascular diesease.
Mori and colleagues at the University of Western Australia
have found that overweight patients being treated for
hypertension were able to realize significant health improvements--not
only in cholesterol levels but also in diabetic symptoms--by
incorporating a daily meal of fish into their weight-loss
diet. The 69 subjects in the study were characteristically
overweight middle-aged men and women being treated with
medications for hypertension, who were also at risk for
diabetes and had high serum cholesterol levels.
While
even small amounts of fish and fish oil have been shown
to lower blood pressure and reduce cardiovascular risk,
a possible bad side effect of large amounts of fish
consumption is impairment of glucose tolerance, or a
worsening of diabetic symptoms. The authors were looking
for additive or synergistic effects oncholesterol levels
and diabetic symptoms when a weight-loss diet was combined
with a daily meal including fish. A gratifying result
of the study was that the combination method lowered
the patients' cholesterol levels, while also having
a beneficial effect on their glucose metabolism and
promoting successful weight loss. The critical, and
positive, difference with this specific regimen was
that the fish meals were part of a relatively low fat
diet (30% or less of calories from fat), while in a
previous study the fat content of the prescribed diet
was 40%. The authors hypothesize that the patients'
glucose tolderance improved because the fish-plus-weight-reduction-diet
regimen might have produced changes in fatty acid delivery
to the liver,as a result of the profound reduction in
blood lipid levels produced by n-3 fatty acids in combination
with a reduction abdominal fat.
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