What is caffeine powder?

Caffeine powder is an extremely concentrated form of caffeine that can be added to beverages. Research neuroscientist Nicole Avena, PhD, shares some warnings about the product, especially about the amount that is safe to consume.

You may be drinking more than you think—and it could affect your health.

Overdoing your daily brew can lead to a host of problems, including jitters, anxiety, insomnia—and much more.

Find out how to prevent morning breath by taking some simple steps the night before.

Learn what to expect and how this year is different from years past.

Strengthen your heart with these heart-friendly workouts.