Children Most Vulnerable to Phthalate and Bisphenol A Exposure from Diets

A new study warns that plastic may not be the only source through which people are exposed to phthalate and bisphenol A.

A new study published in the Journal of Exposure Science and Environmental Epidemiology warns that plastic may not be the only source through which people are exposed to phthalate and bisphenol A and contaminated diets, even if they are organic and cooked and stored in non-plastic containers, can lead to BPA and phthalate exposure with children being the most vulnerable.

"Current information we give families may not be enough to reduce exposures," said Dr. Sheela Sathyanarayana, lead author on the study and an environmental health pediatrician in the University of Washington School of Public Health and at Seattle Children's Research Institute. She is an assistant professor of pediatrics at the UW School of Medicine and an attending physician at Harborview Medical Center's Pediatric Environmental Health Specialty Unit.

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Phthalates and bisphenol A (BPA) are synthetic endocrine-disrupting chemicals. Previous studies have linked prenatal exposure to phthalates to abnormalities in the male reproductive system. Associations have also been shown between fetal exposure to BPA and hyperactivity, anxiety, and depression in girls.

The researchers compared the chemical exposures of 10 families, half who were given written instructions on how to reduce phthalate and BPA exposures, handouts developed by the national Pediatric Environmental Health Specialty Units, a network of experts on environmentally related health effects in children. For five days the other families received a local, fresh, organic food catered diet that was not prepared, cooked or stored in plastic containers

When the researchers tested the urinary concentrations of metabolites for phthalates and BPA, they got surprising results. The researchers expected the levels of the metabolities to decrease in those adults and children eating the catered diet.

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Instead, the opposite happened. The urinary concentration for pthalates were 100-fold higher than the those levels found in the majority of the general population, The comparison comes from a study conducted by the National Health and Nutrition Examination Survey (NHANES), a program of studies managed by the Centers for Disease Control and Prevention and designed to assess the health and nutritional status of adults and children in the United States. The concentrations were also much higher for children as compared to the adults.

Then, the researchers tested the phthalate concentrations in the food ingredients used in the dietary intervention. Dairy products—butter, cream, milk, and cheese—had concentrations above 440 nanograms/gram. Ground cinnamon and cayenne pepper had concentrations above 700 ng/g, and ground coriander had concentrations of 21,400 ng/g.

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"We were extremely surprised to see these results. We expected the concentrations to decrease significantly for the kids and parents in the catered diet group. Chemical contamination of foods can lead to concentrations higher than deemed safe by the U.S. Environmental Protection Agency," said Sathyanarayana.

Using the study results, the researchers estimated that the average child aged three to six years old was exposed to 183 milligrams per kilogram of their body weight per day. The U.S. Environmental Protection Agency's recommended limit is 20 mg/kg/day.

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"It's difficult to control your exposure to these chemicals, even when you try," said Sathyanarayana. "We have very little control over what's in our food, including contaminants. Families can focus on buying fresh fruits and vegetables, foods that are not canned and are low in fat, but it may take new federal regulations to reduce exposures to these chemicals."
Source-Eurekalert