Have you ever grabbed a cup of coffee to fight off fatigue—only to feel even sleepier afterward? If you’ve asked yourself, “Why am I sleepy after coffee?” you’re not alone. Many people experience ...

Caffeine can be part of a healthy diet for most people. However, too much may be dangerous for your health. Caffeine before bed can reduce sleep quality and make falling or staying asleep harder.

Many people want to avoid medication for ADHD. Some turn to a natural alternative—caffeine—and they may have some success with it. But is using caffeine for ADHD any different from using a medication?

Caffeine can boost your brain or break your rhythm — the difference lies in timing. Caffeine is one of the most widely consumed psychoactive substances globally, with approximately 85% of the U.S.