ALLERGY, RESPIRATORY
Traffic, Dust Linked to Asthma in Kids
Molecule in Skin May Link Eczema and Asthma
Know Your Asthma Triggers
ALTERNATIVE MEDICINE
Bitter Melon Extract May Slow, Stop Breast Cancer
38% of U.S. Adults Use Alternative Treatments
Relaxation Tapes or Mozart Lower Blood Pressure
ANIMAL CARE
Safe Toys for Dogs
Animals Respond to Acupuncture's Healing Touch
Rest Easy. When It Comes to Swine Flu, Your Pet Is Safe
BONES & JOINTS
Rheumatoid Arthritis May Harm Gums
Many Americans Fall Short on Their Vitamin D
Bone Loss Stable on Restricted Calorie Diet
CANCER
Bitter Melon Extract May Slow, Stop Breast Cancer
Herb May Counter Liver Damage From Chemo
Get to Know the Pap Test
CAREGIVING
New Guidelines for Treating Heart Failure
Baby's Sleep Position May Not Affect Severity of Head Flattening
Few Hospitals Embracing Electronic Health Record Systems
CIRCULATORY SYSTEM
Bad Marriages Harder on Women's Health
Exercise Extends Life of Kidney Patients
Health Tip: Are You Anemic?
COSMETIC
New Genetic Links to Baldness Discovered
What to Do If You Have Unsightly Veins
Gum Chewing May Cut Craving for Snacks
DENTAL, ORAL
Gum Disease May Reactivate AIDS Virus
Biological Product Shows Promise Against Gum Disease
Most Insured Adults Worry About Health Care Costs: Poll
DIABETES
Lifestyle Factors Tied to Older Adults' Diabetes Risk
Study Shows Turmeric May Prevent Type 2 Diabetes
24 Million Americans Had Diabetes in 2007
DIET, NUTRITION
Functional Foods Uncovered
Low Vitamin A, C Intake Tied to Asthma Risk
Iced Teas Pose High Risk of Kidney Stones
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
As Earth Warms, Lyme Disease Could Flourish
Seasons Arriving 2 Days Earlier, Study Says
Disinfectants Can Boost Bacteria's Resistance to Treatment
EYE CARE, VISION
Statin Drugs Cause Eye Disorders
Antioxidant-Rich Diet May Protect Against Eye Disease
Cases of Age-Related Farsightedness to Soar
FITNESS
Basketball Star Details His Struggle With Gout
Barefoot Best for Running?
Meditation May Help Put Primary Insomnia to Bed
GASTROINTESTINAL PROBLEMS
HRT Use Raises Risk of Stomach Trouble
Japanese Herbals May Ease Gastro Woes
New Yogurt May Ease Stomach Ulcers
GENERAL HEALTH
Swine Flu Fatality Rate a 'Little Bit' Higher Than That of Seasonal Flu
Reminiscing Helps Build Emotional Strength
Poor Restroom Cleaning Causes Cruise-Ship Sickness
HEAD & NECK
Zen May Thicken Brain, Thwart Pain
Ski Helmets Encouraged for All
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
Airport Full Body Scanners Pose No Health Threat: Experts
The Internet Is Becoming One-Stop Shopping for Health Help
E-Mailing Your Way to Healthier Habits
HEARING
Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
HEART & CARDIOVASCULAR
Heart Disease May Be Prevented By Taking Fish Oils, Study Shows
Kids With Vitamin D Deficiency Linked to Heart Trouble
Laughter Can Boost Heart Health
INFECTIOUS DISEASE
The HPV Vaccine: Preventative Medicine or Human Sacrifice?
Dry Weather Boosts Odds of Flu Outbreaks
Chinese 'Devil Dung' Plant Could Be a Swine Flu Fighter
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Obese Children More Likely to Suffer Lower Body Injuries
Decline of Underweight Children in U.S. Continue to Fall
Fussy Babys Could Be Out Of Your Control
MEN'S HEALTH
Drinking Green Tea May Slow Prostate Cancer
Countdown to Hair Loss
Noise Hurts Men's Hearing More, Study Shows
MENTAL HEALTH
The Acne Drug Accutane More Than Doubles Depression Risk
The Unmedicated Mind
Meditation, Yoga Might Switch Off Stress Genes
PAIN
Tai Chi May Help Ease Fibromyalgia
Alleviating Rheumatoid Arthritis
Are We Exercising Pain Away? Not So Much.
PHYSICAL THERAPY
PREGNANCY
Yoga's Benefits Outweigh Risks for Pregnant Women
Exercise Boosts Bone Density in Breast-Feeding Moms
For Baby and Mom Alike, Breast-Feeding May Be Best
SENIORS
Nighttime Urination Linked to Higher Death Rate Among Elderly
High-Impact Activity May Be Good for Old Bones
Exercise Benefits Even the Oldest Old
SEXUAL HEALTH
SLEEP DISORDERS
Daylight Savings: Not a Bright Time for All
Moderate Aerobics May Ease Insomnia Symptoms
Sleeping Could Help Women Lose The Baby Fat
WOMEN'S HEALTH
Natural Oils Help Lower Body Fat For Some
Air Pollution Slows Women's Marathon Times
Sugary Colas Tied to Gestational Diabetes
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Main Ingredients in Household Dust Come From Outdoors

(HealthDay News) -- Most of the dust that coats your furniture and floors comes from outdoors and can pose a health threat, a new study suggests.

The researchers developed a computer model that can track the distribution of outdoor soil and airborne particles into homes and found that more than 60 percent of household dust originates from tracked-in soil and airborne particles from the outdoors. The remainder is from dead skin shed by residents, fibers from carpets and upholstered furniture.

This outdoor-based dust can contain lead, arsenic and other potentially harmful substances, said the Arizona researchers. For example, they estimated that 60 percent of arsenic in floor dust may come from arsenic in the surrounding air, with the remainder coming from tracked-in soil.

The substances in household dust that originates outdoors may be a special concern for homes with children, who put dust-contaminated toys and other objects into their mouths, said David Layton and Paloma Beamer of the University of Arizona in Tucson, who added that their computer model may prove useful in evaluating ways to reduce contaminants in dust and associated human exposure.

The study was released online in advance of publication in the Nov. 1 print issue of the journal Environmental Science & Technology.

SOURCES: Environmental Science & Technology, news release, November 2009