Learn how caffeine affects brain chemicals and health, sleep, and mood. Understand safe daily limits, hidden sources, and ...

A major Harvard-linked study of over 130,000 people suggests that regular caffeine consumption may lower the risk of dementia ...

Coffee does more than wake you up. Discover 15 surprising and weird effects coffee can have on your body, from brain function ...

Could coffee be the liquid key to longevity? A new study reports that the world’s most widely used stimulant can extend lifespan and affect how cells respond to genetic damage — though there’s a ...

Medically reviewed by Kristie Reed, PharmD Key Takeaways Green tea extract and caffeine together can boost focus and mental ...

Plus, how to find your caffeine sweet spot.

A new study reveals that certain caffeine metabolites in urine are linked to diabetic retinopathy risk in men, offering a promising path toward noninvasive biomarkers for early screening and disease ...

A recent review of animal research suggests that caffeine might help ease symptoms of anxiety and depression by reducing ...

These popular beverages often have many other ingredients, like vitamins and plant extracts. Here’s what you should know about them.