Whether it's farmers in India, office workers in Spain or stock brokers in California, people are tinkering with time. Is it time to change the time zones?
Introducing healthy habits early can make a big difference on your toddler's health later in life.
Before he was diagnosed with testicular cancer, Jamil Nathoo was healthy and strong. Now he's in remission, and ready to tackle a triathlon.
Pain is the most common condition for which medical cannabis is taken, and one of the few for which there is promising clinical data in humans.
Twenty U.S. states allow medical marijuana and others are weighing its medicinal or recreational use.
The World Health Organization wants you to stop eating so much sugar. Seriously.
Tatyana McFadden is a force to be reckoned with. She is one of the fastest wheelchair racers in the world.
Twelve-year-old Louis Corbett of New Zealand has a disease that will blind him, and he is on a "farewell to vision" world trip.
Twelve-year-old Louis Corbett has a disease that will blind him, and he is on a "farewell to vision" world trip.
Doctors in Boston say a child infected with the dangerous virus appears to be free of HIV nine months after birth.
Craving junk food? Don't give in until you check out these cool, creative and low-cal recipes.
I am more convinced than ever that it is irresponsible to not provide the best care we can, care that often may involve marijuana.
When it comes to prostate cancer, aggressive surgery saves lives and leads to a better quality of life, according to a new study.
For cancer patients and their caregivers, support groups are an important addition to treatment, creating an environment where they can learn coping skills.
Alzheimer's disease may kill 500,000 Americans a year, far higher than previously reported, new research shows.
Transcendental meditation, exercise, and cognitive behavioral therapy have helped me thrive in life.
A study of mental-health risk finds rates of many mental disorders are much higher in soldiers than in civilians.
Clean your humidifier after using it heavily, or after periods of not using it.
Are the fitness benefits of riding your bike worth the risk of an accident? There's only one way to find out: Take a two-wheel tour of seven cities.
Some noise machines may be too loud for babies and could potentially damage their hearing, a new study suggests.
Food allergies are on the rise, and are currently the fifth leading chronic illness in the United States.
Shopping is a lot more fun for Rose Anne Schulman since she went from a size 20 to a size 4.
The rate of ancephaly, a birth defect, is more than four times the national average in three Washington state counties.
Children of women who regularly ate peanuts or tree nuts during pregnancy appear to be at lower risk for nut allergies than other kids, according to new study.
Holidays are a particularly challenging time for us food-allergic individuals with so many desserts and homemade treats, casseroles and dips laid out on the table -- largely without ingredient labels.
CNN celebrates Rare Disease Awareness Day by sharing the stories of six children finding joy in life's simple pleasures.
The disease that carves an insidious path through the brain seems to be doing the same through sports.
A study out that questions the stated benefits of breast-feeding is sure to reignite the debate over whether breast is best.
Fit Nation participant Ron Cothran explains what led him to undergo gastric bypass surgery.
Correspondent Miles O'Brien gives first interview after a surgeon removed his left arm just above the elbow.
A promising way to stop a deadly disease, or an uncomfortable step toward what one leading ethicist called eugenics?
Choosing healthier snacks may soon be easier. The FDA says updating nutrition labels is a priority this year.
According to the American Society for Aesthetic Plastic Surgery, there was a 58% increase in buttock enhancement surgery in 2013 compared to 2012.
Many people don't realize it's just as easy to become dehydrated in the winter as in the summer.
Miles O'Brien, award-winning science journalist and former CNN correspondent and anchor, revealed in a blog post that his left arm was amputated recently after an accident.
A coalition of groups is urging the Food and Drug Administration to revoke approval of the prescription drug Zohydro.
Through Violin for Vasculitis I have found a purpose, both in my performance and in my once-tragic diagnosis.
As First Lady Michelle Obama's Let's Move! celebrates its fourth anniversary, CNN looks at the progress made in the fight against childhood obesity.
"About 20" cases of a polio-like syndrome have been identified in California children over the past 18 months, a Stanford University researcher says.
Women with BRCA1 mutations should remove their ovaries by age 35, according to a study that published online Monday.
Doctors are looking for more information about a "polio-like syndrome" that has caused paralysis in a few children in California.
Even if your toes seem miles away when you reach down to touch them, you can still aim to become as limber as Olympic figure-skating champ Gracie Gold.
The disease that led to actor-director Harold Ramis' death is one of an often-mysterious family of maladies that can starve organs and cause painful tissue damage.
Students at UCSB will be getting an unapproved vaccine to combat a meningococcal disease outbreak there.
It was an unbelievable honor to be trusted with the care of our Olympic athletes.
Chris Ross lost more than 100 pounds -- not by eating differently, but by eating less.
Carbon monoxide, a silent killer, is being blamed in the weekend death of a restaurant manager at a Long Island Mall.
Solitary confinement has been associated with many different physical and psychological ills.
Millions of Americans suffer from bad breath. For some, it's ever-present, no matter what they do. But there are some steps you can take.
At least eight people came down with listeria -- and one of them died -- after, authorities believe, eating "Hispanic-style cheese."
Hundreds of young adults are getting a lesson in health insurance from some unusual places, such as an Affordable Comedy Act show and slam poetry in Chicago.
The prescription drug abuse epidemic leads the DEA to try a texting tip line to encourage pharmacists to anonymously report abuse.
Tap water test results in 10 West Virginia homes after a chemical spill will be known in one to three weeks, scientists said.
Fear and uncertainty are prevalent when you have cancer. What you need is hope -- in super doses.
CNN Fit Nation's Sia Figiel struggled to manage her diabetes, until the dentist gave her some shocking news.
Scientists are still examining how loneliness affects our bodies. Here are some findings over the years.
The flu is hitting younger people harder this year than it has in years past, the CDC announced Thursday.
There seem to be conflicting messages regarding mammograms, and the headlines are often confusing.
Health officials say the tap water near Charleston, West Virginia, is all right to drink. But many residents aren't buying it.
West Virginia's governor is asking federal authorities to do further studies on the safety of the state's water after last month's chemical spill.
Many people believe that when it comes to weight loss, men have an advantage. But what's the real truth?
Loneliness and isolation can affect your quality of life -- and maybe your quantity of life, too.
You're smarter than your ancestors but dumber than you were at age 5. At least according to your IQ score.
More American women have had medical help to have their babies than ever before.
Looking for a new way to reach your fitness goals? Now's the time to check out some of the hottest fitness apps as 2014 gets underway.
How many calories do you think Winter Olympic athletes burn? speeds.
Kimberly and Craig Fugate weren't expecting identical quadruplets Kenleigh, Kristen, Kayleigh and Kelsey.
The number of chemicals known to be toxic to children's developing brains has doubled over the last seven years, researchers said.
Subway said it is phasing out a chemical from its breads that is also found in yoga mats and shoe soles.
Lee and Beth were high school sweethearts. When they reconnected more than 20 years later, Lee weighed 454 pounds.
Mike Wilber was introduced to pop at a young age. And giving it up for Fit Nation hasn't been easy.
For the first time, scientists have created human lungs in a lab -- an exciting step forward in regenerative medicine.
Health officials say a University of California, Berkeley student may have exposed classmates and strangers to measles.
Keep both your ticker and your tummy happy by diving into light, nutritious and oh-so-delicious Valentine's Day desserts.
Researchers used DNA to track historical mixings of populations during more than 4,000 years in a new study.
The U.S. joins other nations, organizations to launch the Global Health Security Agenda, an effort to work toward a world free of infectious disease.
As long as you need to get a workout in, you might as well make it quality, just-the-two-of-you time, right?
Here are five easy things you can do to take better care of your heart (including having sex).
The debate over annual mammogram screenings continues this week as new data from a long-term breast cancer study come under fire.
The United States Navy is able to avoid major outbreaks of contagious diseases like those seen on cruises. How?
I'm healthier and stronger than ever after my transplant, and there's nothing I can't do.
Chick-fil-A Inc. announced plans Tuesday to use chicken raised without antibiotics in all of its restaurants within five years.
Dr. Henry Heimlich, who developed the Heimlich maneuver to save someone from choking, has published a new autobiography.
Nanomotors, tiny rocket-shaped metal particles, might one day take a wild ride inside your body.
A ventilator kept a brain-dead Canadian woman breathing for weeks so the baby growing inside her could survive. She died a day after doctors delivered her son.
If you doubt there's a dental health crisis in America, walk into any emergency room.
It was a medical mystery of a different kind, one that warmed hearts. A family reveals they left the message in snow at Chicago's Rush University Medical Center
18 neurosurgery patients might have been exposed to Creutzfeldt-Jakob disease in Winston-Salem, North Carolina.
A leading drug candidate for low sexual desire in women hasn't gotten approved for use in the United States, but the company backing it isn't giving up.
An Arkansas woman, who lost her baby last month after coming down with the H1N1 flu virus, has now lost her life.
Gianni Cristini is only 10, but his mental illness is a struggle for his family.
Can being unknowingly allergic to a certain kind of food cause you to pack on the pounds?
Overweight since childhood, Mario Colao realized his habits of binge drinking, smoking two packs of cigarettes a day and overindulging in food were killing him.
Anyone who's ever read a nutrition label knows our food supply is full of hard-to-pronounce chemicals.
Naloxone. It's the name of a potentially lifesaving drug designed to reverse opioid prescription drug and heroin overdoses.
The company that makes some Uncle Ben's products says it is recalling bags of flavored rice after people developed flushing and rashes after eating one variety