Navigation Links
Exposure to Common Chemicals May Affect Thyroid Function
Date:7/14/2011

THURSDAY, July 14 (HealthDay News) -- Chemicals called phthalates and bisphenol-A (BPA) that are found in solvents, plastics and numerous household products may alter levels of thyroid hormones in the body, according to a new study.

Thyroid hormones play a role in many critical bodily functions, including reproduction and metabolism.

Researchers from the University of Michigan School of Public Health used data from the U.S. National Health and Nutrition Examination Survey to compare thyroid levels and traces of phthalates and BPA in urine samples of 1,346 adults and 329 teenagers. Their findings confirmed previous research linking BPA -- used in certain plastic water bottles and the linings of canned foods -- with disruptions in thyroid hormone levels, they said.

Overall, higher concentrations of the chemicals had an inverse impact on thyroid levels, said study lead author John Meeker, an assistant professor, in a university news release. The greater the exposure to phthalates and BPA, the lower the thyroid hormone levels.

The strongest link occurred with exposure to DEHP, a phthalate commonly used as a plasticizer, which people come into contact with through diet.

In the cases of DEHP ingestion, urine samples showed that the greatest exposure was associated with as much as a 10 percent drop in thyroid hormones.

"This seems like a subtle difference," said Meeker, "but if you think about the entire population being exposed at this level you'd see many more thyroid related effects in people."

The authors concluded that additional research is needed. In other ongoing studies, they are assessing the chemicals' potential effects on pregnancy outcomes and child development.

Developing fetuses and children may be particularly vulnerable to disruptions in thyroid hormone levels associated with exposure to these and other environmental chemicals, Meeker said.

The researchers, acknowledging some limitations of their study, said their work could be improved by following people over time and collecting several urine samples, since these chemicals metabolize quickly and one single sample may not represent the true chemical exposure.

The findings were published online July 11 in the journal Environmental Health Perspectives.

More information

The U.S. Department of Health and Human Services provides more information on the safety of phthalates and BPA.

-- Mary Elizabeth Dallas

SOURCE: University of Michigan, news release, July 11, 2011


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Fetal Exposure to Common Epilepsy Drugs May Harm Kids IQ: FDA
2. On-the-Job Lead Exposures Falling, But Still a Problem: CDC
3. Exposure to parental stress increases pollution-related lung damage in children
4. Early Chemical Exposures May Affect Breast Health: Report
5. Genetic mutation linked to asbestos exposure
6. Early exposure to pets does not increase childrens risk of allergies
7. New study suggests link between estrogen exposure, high blood pressure
8. CDC Warns Against Exposure to Mad Cow-Like Brain Diseases
9. Moms Exposure to Plastics Chemical Tied to Babys Wheeze
10. BPA exposure may be associated with wheezing in children
11. Pesticide Exposure in Pregnancy Linked to Lower IQ in Kids
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Exposure to Common Chemicals May Affect Thyroid Function
(Date:5/26/2017)... ... May 26, 2017 , ... The Radiology Business Management ... on current legislative activity and the latest regulatory concerns impacting RBMA members. The ... 10, and will continue through Monday, Sept. 11, at the Ritz-Carlton, Tysons Corner ...
(Date:5/26/2017)... ... May 26, 2017 , ... via seating is ... back 24/7 task chair specifically designed for clinical areas. Genie Copper Mesh is ... partner with Cupron® to provide customers with a game changing chair that is ...
(Date:5/26/2017)... ... 2017 , ... Rob Lowe acts as host and helps educate and inform ... hiking in American. Viewers can reconnect with America as it explores some of the ... consumers have looked for an inventive new place for a family vacation, and have ...
(Date:5/26/2017)... ... ... of Eden”: retells the stories of three Bible figures in modern terms. “Just What ... trader, horse farmer, artist and a former GM journeyman. Born in 1953 in Portland, ... to Dayton, Ohio, where Penny graduated high school. At sixteen, she toured France to ...
(Date:5/24/2017)... ... 24, 2017 , ... Dr. Alan I. Benvenisty, MD is dual board certified ... is known for his distinguished expertise and experience in the diagnosis and treatment of ... in treating renovascular disease and aortic aneurysm . He is known for his ...
Breaking Medicine News(10 mins):
(Date:5/6/2017)... Texas , May 5, 2017   Provista , ... with more than 200,000 customers, today announced Jim Cunniff ... a wealth of executive and business experience to Provista, including ... compounding pharmacy in California . He assumed ... "Jim is a great fit for Provista," says ...
(Date:5/4/2017)... May 4, 2017 Clarius Mobile Health, ... handheld ultrasound scanners this week at the American ... (ACOG) in San Diego, CA ... "Clarius is the perfect tool for clinicians to ... rate, and evaluate pregnancy-related complications like ectopic pregnancy ...
(Date:5/3/2017)... Calif. , May 3, 2017 ... of any hospital or healthcare facility. Commonly referred ... room is equipped with diagnostic imaging technology to ... of the heart. In these spaces, a team ... catheterization, balloon angioplasty, percutaneous coronary intervention, congenital heart ...
Breaking Medicine Technology: