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By Mo Costandi of Nature magazine European researchers have identified a gene that is linked to improved memory, but also to increased risk of post-traumatic stress disorder (PTSD). Dominique de Quervain of the University of Basel in Switzerland and his colleagues recruited around 700 healthy young volunteers, obtaining DNA samples from them to analyze the sequence of their PRKCA gene.

Study in British Medical Journal finds association between prescription drug sleep aids and increased risk of death

Smoking marijuana within three hours of driving tied to increased risk; drivers over 35 more likely to crash

By now it is common knowledge that being severely overweight puts people at increased risk of suffering from heart disease, stroke and diabetes and that obesity--defined as weighing at least 20 percent more than the high side of normal--is on the rise.

Men who regularly take several medications are at increased risk for sexual problems , a new study says.

Adding Xarelto to usual drug regimen cut risk of subsequent heart trouble but was linked to increased risk for bleeding

Erica Hill and Chris Wragge talk to Dr. Holly Phillips about new research that reveals women with cancer-causing strains of human papillomavirus may be at increased risk for cardiovascular disease and stroke

Researchers have found that high doses of Vitamin E are linked to an increased risk of getting prostate cancer. Dr. Jon LaPook reports.

Study finds 2.4% increased risk of death associated with iron, Vitamin B-6, magnesium, others, but no direct cause-and-effect

Out of control drivers aren’t the only thing city cyclists have to worry about. New research suggests that cyclists are at increased risk of lung damage because of soot

Men who don't have children may be at increased risk of dying from heart disease , a new study says. Childless men in the study had a 17 percent higher risk of death from cardiovascular disease than fathers, the researchers said

For months, many New York City firefighters worked in the toxic air at ground zero, digging through the rubble of the World Trade Center. Now, as Dr

Special inflatable "boots" help curb increased risk for potentially deadly blood clots, obstetricians group says

Not everyone who is obese needs to lose weight — it's possible to carry extra pounds and still be healthy, a new study says.

Despite conflicting report, a new study finds that there is no link between an increased risk of brain cancer and cell phone use among children and teens. Dr. Jennifer Ashton reports.