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Some supplements sold to improve workouts contain a stimulant that's been banned and may pose health risks, according to tests. The Food and Drug Administration has warned seven manufacturers.

In the past 50 years, better medical care and healthier habits have greatly reduced the risk of dying young from heart disease. But the obesity epidemic threatens to reverse that happy trend.

He's an unusual candidate, but his rise makes complete sense if you consider the current political climate.

Google is sharing detailed search data with academic and public health researchers to help them fight the spread of infectious diseases. Will it work?

Dr. Michael LeFevre, who stepped down as chairman of the U.S. Preventive Services Task Force in March, describes how the health law changed how the group works and communicates its findings.

Dr. Michael LeFevre, who stepped down as chairman of the U.S. Preventive Services Task Force in March, describes how the health law changed how the group works and communicates its findings.

Camp Century was a research station and test site for deploying nuclear missiles before it was abandoned under the ice in the '60s. Scientists say pollutants left behind may spread as the ice melts.

A group of environmentalists on Tuesday delivered a climate change denier award to Congressman Darrel Issa’s Vista office. A San Diego climate researcher says people in denial about climate change are "downright dangerous."

During his four years as a prisoner, professor Ajmal Khan came across boys in remote Waziristan who were hungry to learn. He taught them math and science, but his captivity became a lesson, too.

Republican Sens. John McCain of Arizona and Marco Rubio of Florida are favored to win their GOP primaries on Tuesday. So is Democrat Debbie Wasserman Schultz despite angry opposition.