Study Finds Fire Retardant May Pose Risk to Thyroid

A common flame retardant can be found in the blood of up to 97 percent of Americans, and at levels 20 times higher than in Europeans, studies have shown. Now, research at the University of California at Berkeley has found that pregnant women with higher blood levels of the compound had altered thyroid hormone levels, a factor that could impact fetal health.

“Normal maternal thyroid hormone levels are essential for normal fetal growth and brain development, so our findings could have significant public health implications,” Jonathan Chevrier, a UC Berkeley researcher, said in a statement.

Analyzing the blood of 270 pregnant women, the researchers found elevated levels of polybrominated diphenyl ehters, a group of flame retardants also known as PBDEs, and low levels of the hormone TSH, which could be the first step to clinical hyperthyroidism. The condition has been linked to altered fetal neurodevelopment, increased risk of miscarriage, premature birth and intrauterine growth retardation, according to the researchers.

The study’s authors were also concerned that the women in the study, like other Californians, tend to have higher blood levels of PBDEs than most Americans.  Because of its strict laws about fire safety, California residents have some of the highest exposure levels in the world.

The use of PBDEs increased in the 1970s when the U.S. government implemented new fire safety standards. The compound can be found in everything from carpets to textiles to electronics.

But, according to the researchers, few studies have been conducted about the health risks of the retardant, despite its prevalence in the U.S.

Certain PBDEs have been banned by the Stockholm Convention on Persistent Organic Pollutants, the European Union and eight U.S. states, including California, but they are still present in products made before 2004. Another PBDE compound will be phased out by 2013. But, according to researchers, the the health impact of the new compounds that will replace them has not been tested.

The study will be published in the journal Environmental Health Perspectives on June 21.

Print Print  

Like what we're doing? We'd appreciate your support.

One comment to “Study Finds Fire Retardant May Pose Risk to Thyroid”

  1. Fire compartmentation

    This is a really interesting read. I had heard about the affects of PBDE’s but I did not know it was more prominent in American women then it was in Europeans.

Leave a comment