PFNA Archives

PFNA

October 8, 2024

PFAS levels increasing in Arctic animals, study finds

By Douglas Main

Concentrations of toxic pollutants known as per- and polyfluoroalkyl substances (PFAS) are continuing to increase in Arctic animals such as polar bears despite efforts to rein in their use, according to a new study.

One type of PFAS known to be of particular harm, PFOS, was largely phased out starting 20 years ago. But average levels in several populations of polar bears and seals have continued to go up in recent years, according to the paper, published this month in the journal Science of the Total Environment.

Exposure to some PFAS, also called “forever chemicals,” increases the risk of a wide range of health harms to humans and animals, scientists have found.

“There’s nothing in the Arctic that isn’t contaminated by PFAS,” says study co-author Rainer Lohmann, who studies persistent organic pollutants as an environmental chemist at the University of Rhode Island. “It’s just very sad.”

Of the animals looked at in the study, polar bears had the highest concentrations of various types of PFAS, approximately 10 times what has been found in people in the region.

Troubling findings were also seen for a type of PFAS called PFNA. Average concentrations of PFNA have steadily risen over the last couple decades in all populations of polar bears and seals studied, and appear to still be on the rise, according to the paper.

The latest published work adds to more than 200 studies that have turned up PFAS in well over 600 animal species, including those that are threatened or endangered.

September 18, 2023

Certain common chemicals associated with higher odds of cancer in women

By Carey Gillam

Women exposed to several widely used chemicals appear to face increased odds for ovarian and other certain types of cancers, including a doubling of odds for melanoma, according to new research funded by the US government.

Using data collected by the Centers for Disease Control and Prevention (CDC), a team of academic researchers found evidence that women diagnosed with some “hormonally-driven” cancers had exposures to certain per- and polyfluoroalkyl substances (PFAS), which are used in thousands of household and industrial products, including in stain- and heat-resistant items.

They found similar links between women diagnosed with cancer and high exposures to phenols, which are commonly used in food packaging, dyes and personal care products.

The study, published late Sunday in the Journal of Exposure Science and Environmental Epidemiology, did not find similar associations between the chemicals and cancer diagnoses in men.

PFAS chemicals, in particular, may disrupt hormone functions specific to women – a potential mechanism for increasing their odds of hormone-related cancers, the researchers determined. Hormonally active cancers are common and hard to cure, making deeper inquiry into potential environmental causes critical, the researchers said.

“People should care about this because we know that there is widespread human exposure to these chemicals and we have documented data on that,” said Max Aung, assistant professor of environmental health at USC Kreck School of Medicine and a senior author of the study.

“These chemicals can increase the risk of various different health outcomes and they can alter your biological pathways… that is important to know so that we can better prevent exposures and mitigate risks,” Aung said.