WebMD is suing Everyday Health, a competitor in digital health content, for "unfair" marketing practices related to search engine keywords.

A new sports psychology study proves that ball hogs can hurt team success.

New York will become the 23rd state to allow medical marijuana for specific conditions, though smoking the drug will still be forbidden.

Watchdog group Public Citizen on Thursday urged hospitals across the United States to stop sponsoring mobile health screenings they say use "fear mongering" to upsell patients on costlier follow-up tests that might even present additional risk.

A new animal model for AIDS research has been developed by strengthening the HIV-1 virus and weakening the immune response of the pigtail macaque monkey. As it turns out, antiviral proteins in infected cells are key to the immune response in the animal.

Researchers say parents speak fewer words to their toddlers with a television running in the background.

Ketamine continues to show promise for treating severe depression resistant to traditional therapies. But is the often abused drug safe?

Physician review site ZocDoc found the top 10 cities in the U.S. for doctors, based on patient satisfaction. But doctors don't believe patient satisfaction equates to quality of care.

New evidence shows a racial health disparity in kidney disease with impoverished African-Americans most likely to die on dialysis.

New research confirms a male bias in shaping evolution; men are more likely to pass genetic mutations to their children.

A patient in Spain who smoked the synthetic marijuana derivative known as Spice experienced a catatonic psychosis with abnormal movement, in what doctors reported as a world-first.

The discovery of a molecular "on-off" switch for conversion of white fat into beige, energy-burning fat may lead to new drug therapies for obesity and related illnesses.