Teens often experiment with substances like marijuana, but abusing marijuana may pose a threat to memory abilities.

Many people exercise and eat healthily to improve their overall physical health, but those habits might also boost mental health.

Some people turn to medications like varenicline (brand name Chantix) to help quitting smoking. Chantix can be helpful, but it comes with a few warnings.

Depression and stress can damage heart health. Put both conditions together, and it may cause a double-whammy that amplifies heart risks.

Even if you're close to having low testosterone but not quite there, you still might encounter some related health problems.

Caring for a family member with dementia can be difficult. A structured treatment plan, however, may help you and your loved one.

Exercise in your teens is a good thing, but even with exercise, poor ability to cope with stress may affect your heart later in life.

Electronic cigarettes, or e-cigs, may be increasing in popularity among teens. And teens may not have much trouble buying e-cigs online, despite being underage.

A short-term effect of concussions could be used as an important tool for doctors diagnosing and treating this brain injury.

Controversy swirls around whether ADHD is over- or underdiagnosed — bringing into question the real rate of ADHD. New evidence sheds light on the factors that may affect reported rates of ADHD.