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Modafinil has been approved for treatment of narcolepsy, but it's often used to improve mental performance. The question is, does it work? A new study says probably not.

Juice and smoothies can be a convenient way to get more servings of fruits and vegetables. So what's the better gadget between a blender and juicer if you want to get more beneficial nutrients?

Each year, about 16,000 Americans die from overdosing on prescription painkillers. The epidemic of prescription opioid addiction touches seniors along…

Hospital admissions caused by bike injuries have more than doubled in the past 15 years across the country. One doctor thinks the "Lance Armstrong effect" could be a reason for the jump.

Guidelines just out from the American Diabetes Association say Asian-Americans with a typically healthy body mass index can still be running a substantial risk for developing diabetes.

Tobacco's link to lung cancer, stroke and heart attack is well-known. But smokers are also more likely to die from kidney failure, infections and breast cancer, a revised tally suggests.

Women under 55 are twice as likely to die after being hospitalized for a heart attack than men. Women delay treatment because they may not recognize the symptoms and they're reluctant to make a fuss.

The nation's ear, nose and throat doctors want people to diagnose sinus infections themselves in an effort to reduce overuse of antibiotics. They're telling you how.

Babies in the neonatal intensive care unit often get multiple tests and treatments a day. Not all of them help, and some can hurt. Neonatologists have picked the five least likely to do good.

Life insurance customers will receive discounts each year based on their activity levels. The practice is used in Australia, Europe, Singapore and South Africa. But privacy experts are concerned.