Teens who are heavy users of alcohol or marijuana end up with more than a high.

Brain changes related to forgetfulness are associated with aging, but aging alone does not cause memory loss.

Are we better off slathering on sunscreen or donning sun protection clothes?

Even with recent advances in safety and increases in drivers' compliance with the rules of the road, traffic crashes are still the leading killer of Americans under age 35.

The issue of stopping American from getting fatter continues to cook up controversy.

Nobody wants to get sicker in a hospital than they were at home, but that's the reality for 1.7 million Americans every year, who develop healthcare-associated infections (HAIs).

Falls among older people are as serious a health problem as heart attacks and strokes, experts say.

To keep your new year's resolutions, aim to change your habits, rather than setting specific goals, experts say.

Treating obese women's depression may help them lose weight, a new study suggests.

We don't have to submit to all of winter's indignities here are five ways to prepare your skin for winter.

Previous commanders-in-chief hid their illnesses, afflictions and even their surgeries from the public.

How to protect your children against measles, mumps, chickenpox and more.

How will you look in 20 years?

Here's the lowdown on what works, and what to avoid.