I also review coffee and coffee machines for a living. But caffeine is also, quite simply, a drug. It happens to be the drug ...

For many of us, caffeine is more than just a morning pick-me-up, it's a lifestyle. Whether it’s that frothy latte, iced cold brew, or trusty cup of black tea, caffeine often feels like the fuel that ...

Caffeine is the most common, normalized stimulant in the world, with many people consuming caffeine daily. According to Ron Cotterel, M.D., M.S., a family medicine and integrative family physician, ...

Quitting caffeine suddenly can lead to caffeine withdrawal. Symptoms of caffeine withdrawal include headache, sleepiness, and feeling slow or sluggish physically, mentally, or both. Cutting back ...

Would you give up soda? Well, a group of Diet Coke- and Coca-Cola-obsessed USA TODAY journalists decided to try. I have been drinking Coca-Cola for as long as I can remember. I've tried to quit ...

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 ...

Coffee consumption influences your blood pressure and the way your blood vessels relax. People with high blood pressure may ...