Researchers have found a link between exposure to the chemical group known as phthalates found in personal care products to obesity in young children including increased body mass index (BMI) and waist circumference.
Phthalates are man-made, endocrine-disrupting chemicals that can mimic the body's natural hormones. They are commonly used in plastic flooring and wall coverings, food processing materials, medical devices, and personal-care products. While poor nutrition and physical inactivity are known to contribute to obesity, a growing body of research suggests that environmental chemicals - including phthalates - could play a role in rising childhood obesity rates.
This study was the first to examine the relationship between phthalate exposure and measurements used to identify obesity in children. The paper is available online in the journal Environmental Research. The project was funded by the National Institute for Environmental Health Sciences, the National Cancer Institute, and the U.S. Environmental Protection Agency.
"Research has shown that exposure to these everyday chemicals may impair childhood neurodevelopment, but this is the first evidence demonstrating that they may contribute to childhood obesity," said the study's lead author Susan Teitelbaum, PhD, Associate Professor in the Department of Preventive Medicine at Mount Sinai School of Medicine. "This study also further emphasizes the importance of reducing exposure to these chemicals where possible."
The percentage of obese children ages six to 11 in the United States has grown from seven percent in 1980 to more than 40 percent in 2008, according to the U.S. Centers for Disease Control and Prevention. More than 15 percent of American children between the ages six and 19 are characterized as obese. In New York City, more than one in five children in public schools are obese.
Dr. Teitelbaum and the team at the Children's Environmental Health Center plan to further evaluate the impact of these chemicals on childhood obesity. "While the data are significant, more research is needed to definitively determine whether phthalate exposure causes increases in body size," she said.