Around the world, scientists are finding trace amounts of substances—from sugar and spice to heroine, rocket fuel, and birth control—in our drinking water.

The results of several studies illustrate the damage air pollution is doing to our brains, and the picture isn't pretty.

Most U.S. teenagers are not as active as they should be, but a lack of exercise does not seem to account for rising rates of teen obesity, a new study finds.

Adults today have all been educated on the dangers of smoking, yet so many people still choose to light up. New reports show that the prevalence of adult smokers is no longer dropping yearly. Are we losing the battle?

As we know, sugar may be a huge contributor to our obesity crisis and other chronic diseases. But, new campaigns are pushing chocolate milk as "health food" despite the fact that it contains 16 grams of sugar per serving. Er...

Some studies have linked BPA--a compound found in water bottles--to a risk of brain damage, birth defects, hyperactivity, heart disease, early puberty, obesity, and prostate cancer.

Confused by the H1N1 vaccine? WebMD separates the facts from the hype.

A bad boss may be doing more than just ruining your work day--he or she may be ruining your health as well. New research links having a poor supervisor to a higher risk of heart attack, and that’s not all...

You've been coughing for weeks. How do you know if it's just a hard-to-shake cold or something more serious?

Fingernails can offer clues about the state of our health, and be early indicators of illness.