Gastric Bypass May Dampen Desire for High-Fat
FRIDAY, Aug. 5 (HealthDay News) -- The most common type of
weight loss surgery in the United States appears to help patients
shed pounds by reducing their intake of fatty foods and helping
them stick to a healthier diet, a new study indicates.
In Roux-en-Y gastric bypass, the stomach is reduced to a small
pouch and connected to the middle of the small intestine.
While many patients who undergo this type of surgery lose large
amounts of weight, it hadn't been understood exactly how this
In a study in rats, researchers found that Roux-en-Y leads to a
large reduction in consumption of fatty foods and drinks. This
effect lasted for up to 200 days in rodents that underwent the
This avoidance of high-fat foods seems to be the result of
unpleasant digestive effects that may be caused by increased levels
of hormones associated with food avoidance, the researchers
People who underwent the surgery also reported eating less
The findings were released online in advance of publication in
an upcoming print issue of the
American Journal of Physiology -- Regulatory, Integrative, and
Learning more about how weight loss surgery reduces the desire
to eat fatty foods could lead to new surgical and non-surgical
treatments for obesity, Carel le Roux, of the Imperial Weight
Centre at Imperial College in London, and colleagues said in the
The U.S. National Institute of Diabetes and Digestive and Kidney
Diseases has more about
weight loss surgery.
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