ALLERGY, RESPIRATORY
Folic Acid Might Offer Allergy Relief
'Safe' Ozone Levels May Not Be for Some
Using Music and Sports to Improve Kids' Asthma
ALTERNATIVE MEDICINE
No Verdict Yet on Grape Seed Extract vs. Breast Cancer
Holistic Treatment for Candida Infection
Relaxation Tapes or Mozart Lower Blood Pressure
ANIMAL CARE
'Comfort Dogs' Come to Emotional Rescue
Animals Respond to Acupuncture's Healing Touch
Safe Toys for Dogs
BONES & JOINTS
Many Americans Fall Short on Their Vitamin D
Rheumatoid Arthritis a Threat to the Heart
Genes May Help Drive Rotator Cuff Injury
CANCER
Tanning Beds Shown To Raise Cancer Risk, Study Says
Spice Compounds May Stem Tumor Growth
Many Cancer Patients Turn to Complementary Medicine
CAREGIVING
Coordination Has Led to Quicker Heart Treatment
Simpler Sleep Apnea Treatment Seems Effective, Affordable
Falls Are Top Cause of Injury, Death Among Elderly
CIRCULATORY SYSTEM
Tai Chi and Qigong Offer Many Health Benefits: Review
Night Shift Work Hard on the Heart
Obesity Linked to Heart Failure Risk
COSMETIC
Gum Chewing May Cut Craving for Snacks
New Genetic Links to Baldness Discovered
What to Do If You Have Unsightly Veins
DENTAL, ORAL
Gum Disease Might Boost Cancer Risk
Mom's Vitamin D Levels Affect Baby's Dental Health
A Sweet Way to Shield Baby's Teeth
DIABETES
24 Million Americans Had Diabetes in 2007
Vitamin K Slows Insulin Resistance in Older Men
Out-of-Control Blood Sugar May Affect Memory
DIET, NUTRITION
Imagine Food Aromas That Prevent Overeating
Eating More Soy May Be Good For Your Lung Function
Herb Shows Potential for Rheumatoid Arthriti
DISABILITIES
Could Your Cell Phone Help Shield You From Alzheimer's?
Review Finds Marijuana May Help MS Patients
ENVIRONMENTAL HEALTH
Warmer-Than-Average Temperatures Raise Migraine Risk
FDA Faulted for Stance on Chemical in Plastics
Heavy Traffic Can Be Heartbreaking
EYE CARE, VISION
Action-Filled Video Games Boost Adult Vision
Gene-Transfer Proves Safe for Vision Problem
Stem Cells Repair Damaged Corneas in Mice
FITNESS
Fliers Can Keep Blood Clots at Bay
When It Comes to Lifting, the Pros Have Your Back
Exercise 30 Minutes a Day? Who Knew!
GASTROINTESTINAL PROBLEMS
New Guidelines Issued for Management of IBS
Intestinal Bacteria Trigger Immune Response
HRT Use Raises Risk of Stomach Trouble
GENERAL HEALTH
Heart Disease May Be Prevented By Taking Fish Oils, Study Shows
Fructose Boosts Blood Pressure, Studies Find
Common Social Groups and Race, Seem to Help People Relate
HEAD & NECK
Ski Helmets Encouraged for All
Zen May Thicken Brain, Thwart Pain
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
'Comfort Dogs' Come to Emotional Rescue
Airport Full Body Scanners Pose No Health Threat: Experts
Imaging Sheds Light on How Acupuncture Works
HEARING
Noise Hurts Men's Hearing More, Study Shows
Summer Sounds Can Lead to Hearing Loss
HEART & CARDIOVASCULAR
Implanted Defibrillators Boost Long-Term Survival
Drinking Your Way to Health? Perhaps Not
Ginkgo Won't Prevent Heart Attack, Stroke in Elderly
INFECTIOUS DISEASE
Bacterial Infections May Succumb to Honey
Swine Flu Loves a Crowd
More Medicinal Uses for Pomegranate
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Exercise During Pregnancy Keeps Newborn Size Normal
6 Million U.S. Kids Lack Enough Vitamin D
St. John's Wort Doesn't Work for ADHD
MEN'S HEALTH
Whole Grains, Bran May Fight Hypertension in Men
Could Chinese Herb Be a Natural Viagra?
More Vitamin C May Mean Less Chance of Gout
MENTAL HEALTH
A Little Alcohol May Stave Off Alzheimer's
The Acne Drug Accutane More Than Doubles Depression Risk
Keeping a Healthy Holiday Balance
PAIN
Acupuncture, Real or Fake, Eases Back Pain
Alleviating Rheumatoid Arthritis
'Cell Phone Elbow' -- A New Ill for the Wired Age
PHYSICAL THERAPY
PREGNANCY
Sleeping Could Help Women Lose The Baby Fat
Pregnant Women Exposed To Certain Pollutants Could Lower Childs IQ
Expectant Mom's Exercise Keeps Newborn's Birth Weight Down
SENIORS
Healthy Diet Could Cut Alzheimer's Disease Risk
High-Impact Activity May Be Good for Old Bones
Seniors Cope With Sleep Loss Better Than Young Adults
SEXUAL HEALTH
SLEEP DISORDERS
Meditation May Help Put Primary Insomnia to Bed
Sleeping Could Help Women Lose The Baby Fat
Better Sleep, Grades Seem to Go Up
WOMEN'S HEALTH
Women Who Run May Benefit From Extra Folic Acid
Omega-3 May Reduce Endometriosis Risk
Natural Oils Help Lower Body Fat For Some
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Chemicals in Carpets, Non-Stick Pans Tied to Thyroid Disease

Chemicals found in carpeting, non-stick cookware and fabrics are linked to an increase in thyroid disease, new research suggests.

British researchers analyzed blood serum levels of two types of perfluorinated chemicals in nearly 4,000 U.S. adult men and women, using data from U.S. Centers for Disease Control and Prevention's National Health and Nutrition Examination Survey (NHANES).

Women whose blood levels of perfluorooctanoic acid (PFOA) was in the highest quartile were more than twice as likely to report having thyroid disease as those in the lowest two quartiles. The findings were similar in men, but the results were not statistically significant.

Among men, researchers found an increase in the likelihood of thyroid disease among those who had high levels of perfluoroctane sulphonate (PFOS) in their blood, but the same association was not found in women.

The researchers cautioned that while the data show an association between the chemicals and thyroid disease, they do not prove cause and effect, meaning there could be other explanations for why people with high levels of the compounds in their blood had more thyroid disease.

"We have provided the first evidence of a statistical association between PFOA blood levels and thyroid disease in the 'ordinary' U.S. adult population," said senior study author Tamara Galloway, a professor of ecotoxicology at University of Exeter. "In this type of human population research, it is not possible to be sure whether this is cause or effect. That needs more research."

The study will be published Jan. 21 in the online issue of the journal Environmental Health Perspectives.

Thyroid disease is more common in women than men, and recent reports have found the incidence is rising. Among study participants, about 16 percent of women and 3 percent of men had a thyroid disorder at some point.

Perfluorinated chemicals are pervasive in industrial and consumer products, including food packaging, flame-resistant and waterproof clothing, chemical-resistant tubing and stain-resistant coatings for carpets. The chemicals are chosen for their ability to repel heat, water, grease and stains.

Previous research in animals has shown that the compounds may affect the thyroid, which helps maintain heart rate, regulate body temperature, metabolism, reproduction, digestion and mental health, according to background information in the study.

PFOA and PFOS have also been linked to cancer in animal studies, though research in humans have been inconclusive or have not found a link among the general population.

Because of concerns about toxicity, the U.S. Environmental Protection Agency got commitments from eight manufacturers of PFOA to reduce emissions and usage of PFOA and related chemicals by 95 percent this year, and to move toward eliminating usage of the chemicals completely by 2015.

But that doesn't mean the chemicals will soon be gone from the environment or people's bodies. PFOA and PFOS are also found in water, air and soil, even in remote areas of the globe. PFOA and PFOS have also been detected in the blood of birds, fish and polar bears.

"The formulations used in consumer goods tend to contain more complex forms of PFOA that are quite soluble and/or volatile and can be transported around the globe via ocean currents and in the atmosphere," Galloway said. "That's why PFOA and related compounds are found in every country so far studied."

In addition, the half-life of PFOA and PFOS in the human body is 3.8 years and 5.4 years, respectively, meaning that's how long it takes for half of the chemical to disappear.

The main source of human exposure to PFOA and PFOS is unknown, but it's believed to be through diet, such as from greaseproof food wrappings, researchers said. People may also inhale household dust that contained PFOA or PFOS from fireproof or waterproof coatings on fabrics or carpeting.

"The good news is that mean exposure concentrations seem to be falling over the last few years, coinciding with voluntary reductions in usage by the main manufacturers," Galloway said.

A large study of people living in Parkersburg, W.V., near a DuPont plant that produced perfluorinated chemicals, is ongoing. The residents have higher concentrations of PFOA in their blood than the general population.

Dr. Stephen Rosen, chief of endocrinology and metabolism at Pennsylvania Hospital in Philadelphia, said the study adds to a growing body of research that that suggests common household chemicals may have detrimental effects on human health.

Those chemicals include bisphenol A (BPA), which has been shown to be an endocrine disruptor with potential consequences for reproduction, and phthalates, which animals studies have also found to be endocrine disruptors.

As for PFOS and PFOA, "this is a nice preliminary study, but I wouldn't want to draw major conclusions from it," Rosen said. "However, it definitely should be studied further. These chemicals are ubiquitous in people's homes, and we need to determine if it could be a trigger for thyroid disease in people genetically predisposed."

SOURCES: Tamara Galloway, Ph.D., professor, ecotoxicology, University of Exeter, England; Stephen Rosen, M.D., chief, endocrinology and metabolism, Pennsylvania Hospital, and clinical associate professor, medicine, University of Pennsylvania Health System, Philadelphia; Jan. 21, 2010, Environmental Health Perspectives Published on: January 21, 2010