While we may not view caffeine as a drug, it technically is, since it's a stimulant that affects the central nervous system. In fact, it's the most commonly used drug in the world, and it's estimated ...

That jittery feeling is a sign to change course, not panic. Drinking too much coffee can overstimulate your nervous system, leading to jitters, anxiety, digestive upset, a racing heart, and sleep ...

Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content. Experts recommend capping your caffeine intake at 400 ...

More than 50% of American adults drink coffee every day, meaning that at least half of us rely on caffeine to give us our daily boost. However, although caffeine consumption is high, many people also ...