Can diet soda make you depressed?

If you're prone to the blues, swap your diet soda for some coffee. Robin Miller, MD, explains the link between diet soda and depression and why a cup of java is a healthy alternative.

Find out how too much coffee, too little sleep, and other factors affect your outlook.

Which of these persistent beliefs about diet soft drinks are fact—and which are pure fiction?

Certain health issues, like heart disease and diabetes, may increase the risk for depression. Find out why.

Certain drugs have side effects that could affect your mood. Learn what they are and how to protect yourself.

Research suggests that tea may provide more than just a cozy feeling.