caffeine

Why does coffee make you pee? The science of caffeine as a mild diuretic, tolerance, the dehydration myth, and how it compares to alcohol and water.

Caffeine is the world's most widely consumed psychoactive drug — but most people have no idea how it actually works. It doesn't give you energy. It steals it from the future.

Coffee rankings depend on the year, population denominator, and whether they measure beans, cups, or caffeine. Learn how to compare country consumption without mixing those measures.

Caffeine is the world's most consumed psychoactive drug. It boosts alertness, has real health benefits, and is dangerous in excess. Here's the science of caffeine and how much you can safely drink.