Add Yahoo as a preferred source to see more of our stories on Google. If you regularly drink coffee, tea, energy drinks or soda, you may experience side effects or withdrawal symptoms when slashing ...

For years, I told myself I just liked coffee, until I stopped drinking it for 10 days and realized how much control it actually had over my mood and energy.

When you cut out caffeine, you'll miss out on the temporary spike in blood pressure people often get from caffeine. However, the exact impact of cutting out caffeine can depend on your caffeine ...

Add Yahoo as a preferred source to see more of our stories on Google. However, caffeine, particularly when it’s overused, can cause unwanted side effects like “insomnia, digestive problems, increased ...

Attention all coffee lovers! Feel like you can't even get out of bed without a cup of coffee or other caffeinated beverage? The American Psychiatric Association's Diagnostic and Statistical Manual of ...

According to the nutritionist, the best way to consume L-theanine is to blend green tea with apples and other ingredients ...

Editor's Note: While onsite at the 2013 Annual Meeting of the American Psychiatric Association, Medscape spoke with Ali Canton, MD, of the University of Oklahoma College of Medicine about the ...

Learn how caffeine affects brain chemicals and health, sleep, and mood. Understand safe daily limits, hidden sources, and signs you’re getting too much.

Should a slip in the daily routine prevent you from quaffing your "cup of ambition," you probably don't need a caffeine researcher to tell you what will happen next—you will start to feel sick. In a ...

If you like to start your day with a warm cup of coffee or green tea for an energy boost, you're not alone. The National Coffee Association estimates that 66% of US adults drink coffee daily. Rest ...