Even low levels of tobacco smoke exposure pose a risk to lung health, triggering potentially hazardous genetic changes, according to a new study.

Exposure in the womb to pesticides known as organophosphates may increase the chance that children -- especially boys -- will develop attention problems by age 5, a study shows.

The nation's public schools earn a failing grade when it comes to protecting teens from drugs and gang activity, a nationwide survey suggests.

WebMD's FAQ on the salmonella outbreak and egg recall: What you should know.

Traditional Chinese acupuncture proved no more effective for treating osteoarthritis of the knee than a sham acupuncture, according to a new study.

Pregnant women who drink artificially sweetened carbonated and noncarbonated soft drinks may be at increased risk for preterm delivery, a study shows.

Pregnant women who drink artificially sweetened carbonated and noncarbonated soft drinks may be at increased risk for preterm delivery, a study shows.

CDC: More teens are getting their recommended vaccinations, but vaccination rates still are below target levels. From state to state, teen vaccination rates vary widely.

If your child is the youngest in the class and has a diagnosis of ADHD -- attention deficit hyperactivity disorder, marked by inattention and impulsiveness -- it may be a mistake, according to recent research.

Pet nutrition needs are different from ours. But what are they? A look at the basics of dog and cat nutrition.

Sometimes our best intentions aren’t best for the health needs of our cat. Here are 6 common health mistakes cat owners make and how to avoid them.

Even the best dog owners sometimes make mistakes – especially when it comes to their dog’s health. Here are 5 common health mistakes dog owners make and how to avoid them.

An FDA advisory panel gave a closely divided vote of support to drugmaker Eli Lilly's application to increase the number of approved uses for one of its best-selling drugs, the antidepressant Cymbalta.

People who increase their consumption of green leafy vegetables and fruit and stick to a healthier diet can significantly reduce their risk of developing type 2 diabetes, a new study says.

When movies show actors lighting up a cigarette, it increases the likelihood that young people will start smoking, the CDC said today in a special report.

The nationwide egg recall includes 380 million eggs potentially carrying salmonella bacteria within their shells. The CDC has some 2,000 reports of illness and expects more.

Thousands of high school athletes, mostly football players, are sidelined every year due to heat-related illnesses, and most occur during the preseason, primarily in August, the CDC says in a new report.

WebMD provides tips for looking younger by improving your dental health habits.

Having a pet can help improve mild or moderate depression in many people, experts agree, as well as provide other benefits, such as better sleep and overall health.

Making changes to your own behavior -- your physical activity, diet, and lifestyle -- can be effective natural depression treatments.