Skip to content

    Women's Health

    Font Size
    A
    A
    A

    Chemical May Be Linked to Thyroid Disease

    Study Raises Questions About Non-Stick Chemical Known as PFOA

    DuPont: PFOA Emissions Reduced continued...

    A spokeswoman for DuPont tells WebMD the company has reduced PFOA emissions at its manufacturing sites worldwide by about 98% since that time, exceeding the interim target of 95% emission reduction by this year.

    In response to the latest study, Janet Smith of DuPont points to research in communities with high PFOA exposures that show little or no impact on the thyroid.

    “As the authors of the study indicated, it is not clear whether the associations they observed are causal,” she says. “Epidemiological studies involving workers who have had much higher levels of PFOA exposure than the general public haven’t shown any changes that would indicate impact on the thyroid.”

    Thyroid Disease Link

    Thyroid disease is much more common in women than in men. But the researchers found no evidence of a statistically different effect of PFOA exposure in women and men.

    They did find a link between thyroid disease and higher concentrations of PFOS in men, but not in women.

    Previous studies examining people living in communities where PFOA and PFOS are manufactured have shown little association between exposure to the chemical and thyroid hormone functioning.

    But findings from the largest-ever study of PFOA exposure have not yet been made public.

    In the ongoing C8 Study, researchers measured PFOA levels and health outcomes among nearly 70,000 residents of West Virginia who drank water contaminated with PFOA.

    The study is funded by a $107 million lawsuit settlement agreed to by DuPont in 1998.

    Preliminary findings suggest high PFOA levels may be linked to high blood pressure, high cholesterol, and impaired liver function.

    University of Massachusetts thyroid researcher Thomas Zoeller, PhD, tells WebMD that thyroid disease is increasing, but the reasons for this remain unknown.

    “There is almost certainly an environmental component to this, but we don’t know what that environmental component is,” he says.

    He says PFOA and PFOS may be environmental triggers, but this remains to be proven.

    And because it is not clear how people become exposed, there is no easy message for reducing exposure to these chemical compounds, he says.

    “Right now, I don’t think we have the ability to know what kind of exposures we are getting and where it is coming from,” he says.

    1 | 2

    Today on WebMD

    hands on abdomen
    Test your knowledge.
    womans hand on abdomen
    Are you ready for baby?
     
    birth control pills
    Learn about your options.
    insomnia
    Is it menopause or something else?
     
    woman in bathtub
    Slideshow
    period
    VIDEO
     
    bp app on smartwatch and phone
    Slideshow
    estrogen gene
    Quiz
     

    Send yourself a link to download the app.

    Loading ...

    Please wait...

    This feature is temporarily unavailable. Please try again later.

    Thanks!

    Now check your email account on your mobile phone to download your new app.

    Blood pressure check
    Slideshow
    hot water bottle on stomach
    Quiz
     
    question
    Assessment
    Attractive young woman standing in front of mirror
    Quiz