Moderate-Fat May Be Better Than Low-Fat Diet
Wed Feb 11, 3:37 PM ET
By Merritt McKinney
NEW YORK (Reuters Health) - A low-fat diet can help dieters lose weight,
but a moderate-fat diet that contains plenty of healthy, plant-based fats
may be a better choice for boosting cardiovascular health while shedding
pounds, new research suggests.
In a new study, people on low-fat and moderate-fat diets both lost weight,
but those on the moderate-fat diet experienced a greater reduction in cardiovascular
risk.
"
A heart-healthy weight-loss diet should include monounsaturated fats like
those found in nuts, seeds, peanut and olive oils," lead author Dr.
Christine L. Pelkman of the State University of New York at Buffalo told
Reuters Health.
But people should not go overboard on fats and expect to lose weight, Pelkman
cautioned. "This doesn't mean you can plop down on the couch with
a jar of peanut butter and a spoon," Pelkman said. "Calories
still count."
The Buffalo researcher also advised people not to "chow down on bacon
and double-cheese hamburgers." Pelkman pointed out that these foods
contain lots of saturated fats that are known to increase the risk of heart
disease.
Pelkman and her colleagues compared the effects of low-fat and moderate-fat
diets in 53 overweight and obese men and women. For 6 weeks, people in
the low-fat group consumed a diet in which 18 percent of total calories
came from fat, while for those in the moderate-fat group 33 percent of
calories came from fat.
For the first 6 weeks, the diets were designed to help people lose about
2 pounds per week. After that, participants were put on a 4-week weight-maintenance
plan.
Both the low- and moderate-fat diets led to weight loss, but the moderate-fat
diet had a more positive influence on markers of cardiovascular health,
the researchers report in the American Journal of Clinical Nutrition
(news - web sites).
Even though both groups of dieters experienced a drop in LDL, or "bad," cholesterol,
the low-fat group also experienced a drop in levels of HDL, or "good," cholesterol
after losing weight. HDL levels did not return to normal even after the
4-week weight-maintenance program.
In contrast, HDL levels remained steady in people who consumed a moderate-fat
diet. They also experienced other improvements in cardiovascular health,
including a decrease in triacylglycerol, a fatty substance linked to
heart disease.
"
These results show there are alternatives to a low-fat diet when it comes
to losing weight and reducing your risk for heart disease," Pelkman
said.
The researchers also point out that a moderate-fat diet may be easier to
stick to in the long run than a low-fat plan.
To incorporate healthy monounsaturated fats into the diet, Pelkman recommended
using olive or peanut oils to stir-fry vegetables and adding nuts and
seeds to salads. She also noted that avocados and olives are rich sources
of monounsaturated fats.
SOURCEL: American Journal of Clinical Nutrition, February 2004.
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