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 links the recent use of personal care products like lotions, ointments and hair conditioners to higher levels of endocrine-disrupting chemicals called phthalates in young children. And children of different racial and ethnic groups seemed to have different levels of exposure to these chemicals.

 added to plastics to make them more flexible and durable. They are also used as ingredients in some personal care products.

— which means they can mimic, block or interfere with the body’s own hormones. And when it comes to children, the concern is that they might cause disruptions during key developmental moments.

Prior studies have linked regular exposure to phthalates during pregnancy and early childhood to negative impacts on children – including impaired brain development and behavioral problems, as well as other health concerns.

Researchers have also raised concerns that the widespread presence of endocrine-disrupting chemicals like phthalates in the environment may be contributing to 

girls getting their first menstrual period

Phthalates don’t stay in the body for very long, but health researchers worry about the cumulative effects of those exposures.

The scientific evidence on the harms of phthalates is not yet conclusive, but it accumulating and compelling, says

 a professor at George Mason University whose research focuses on endocrine-disrupting chemicals. “And this is why we have great concern, especially among these very young children whose brains are still very actively developing,” Bloom says.

, Bloom and his colleagues examined clinical data from 630 children ages 4 to 8 from whom they’d collected urine samples. Their parents or guardians filled out surveys about any hair and skin care products they’d applied to the child within the past 24 hours.

“We found that the recent use of several different types of skin care products was associated with higher urinary concentrations of several different types of phthalates,” Bloom says. That, in itself, isn’t new: He notes that prior studies have found similar results in infants and pregnant women, though not in young kids in this 4-8 age range.

But the new study provides clear evidence of the links between kids’ exposures and a range of personal care products, says

, a pediatrician and epidemiologist who formerly served as an assistant administrator for toxic substances at the Environmental Protection Agency. She was not involved in the new study.

Goldman notes that until now, concerns about phthalate exposure have often focused on diet, since the chemicals can leach into food from plastic packaging, as well as food handling equipment such as tubing and conveyor belts.

“I think we should be much more concerned than we have been in the past about the fact that these [chemicals] might be allowed in cosmetics and personal care products,” says Goldman, who is now the dean of the Milken Institute School of Public Health at George Washington University.

Bloom and his colleagues also found differences in phthalate exposures by race and ethnicity. For example, they found strong associations between the use of hair oils and elevated phthalate levels among children who identified as Hispanic, Asian and Pacific Islander. Meanwhile, the use of body lotion was associated with the kinds of phthalates used as ingredients in personal care products among white children but not among Black and Hispanic children. Bloom speculates that some of those differences may stem from differences in the kinds of products marketed to different groups, “but we haven't been able to disentangle that.”

Overall, Black children had the highest levels of phthalates in their urine. Other studies have found that many 

beauty products targeted at communities of color 

“I think this is a very important study, because we need to understand exposures in vulnerable populations such as children,” and understanding differences in exposures by racial and ethnic backgrounds can help researchers figure out ways to reduce risks, says 

 an assistant professor of environmental, reproductive and women’s health at Harvard T.H. Chan School of Public Health who was not involved in the current study.

craze for skin care among tweens and teens

, Mahalingaiah says the findings are an important reminder that some of these products could potentially be exposing kids to endocrine-disrupting chemicals.

“I have three teenage children who are very interested in products and self-care products. And it's something that I'm very concerned about,” she says.

She had her teens download a free app called 

. Shoppers can simply scan the barcode of a product while in the store, and the app will flag potential health concerns linked to ingredients. She notes you can also look up products in the Environmental Working Group’s 

Ultimately though, Goldman says, “I don't think that it's really up to parents to be policing the ingredients in these products. I think it's a job for the FDA. It's a job for the EPA.”

She says more research is needed, but the findings reinforce the need for regulators to take a closer look at this family of chemicals and ask tougher questions about how all this cumulative exposure may be affecting children and other vulnerable populations.

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Maria Godoy

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A new study links the recent use of hair oils, lotions and other personal care products with higher levels of phthalates in children. The hormone-disrupting chemicals are a health concern for kids.

Hair and skin care products expose kids to hormone disrupting chemicals, study finds

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