Caffeine is a naturally occurring stimulant often found in coffee, tea, chocolate and various energy drinks and medications.

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

By Vijay Kumar Malesu A controlled human study reveals that coffee’s complex chemical matrix may shape immune responses ...

A new study shows that even a moderate dose of caffeine alters brain activity during sleep, increasing complexity and nudging neural systems toward a high-efficiency processing state, especially in ...