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Childhood obesity caused by 'toxic environment' of Western diets, study says

A UCSF researcher has determined that a key reason for the epidemic of pediatric obesity, now the most commonly diagnosed childhood ailment, is that high-calorie, low-fiber Western diets promote hormonal imbalances that encourage children to overeat.

In a comprehensive review of obesity research published in the August edition of the journal Nature Clinical Practice Endocrinology & Metabolism, Robert Lustig, MD, professor of clinical pediatrics at UCSF Children's Hospital, says that food manufacturing practices have created a "toxic environment" that dooms children to being overweight.

"It will take acknowledgement of the concepts of biological susceptibility and societal accountability and de-emphasis of the concept of personal responsibility to make a difference in the lives of children," Lustig says.

According to the National Institutes of Health, the number of children who are overweight in the United States has doubled during the past three decades. Currently one child in five is overweight. The increase is true for children and adolescents of all age groups and races and for boys and girls.

Diseases that once were only seen in adults, like type 2 diabetes, now are occurring in increasing numbers in children, according to Lustig. Overweight children tend to become overweight adults, which also puts them at greater risk of high blood pressure, heart disease, and stroke. Children who are obese also are socially ostracized and teased, putting them at risk for depression and other psychiatric conditions, he adds.

"Our current Western food environment has become highly 'insulinogenic,'" Lustig says, "as demonstrated by its increased energy density, high-fat content, high glycemic index, increased fructose composition, decreased fiber, and decreased dairy content."

"In particular, fructose (too much) and fiber (not enough) appear to be cornerstones of the obesity epidemic through their effects on ins
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Contact: Phyllis Brown
pbrown@pubaff.ucsf.edu
415-476-2557
University of California - San Francisco
11-Aug-2006


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