Caffeine is a natural diuretic, which means, in layman’s terms, that it makes you pee. “Caffeine creates blood flow to the kidneys, where liquid is processed,” explains Burak, adding that drinking a large mug or thermos of coffee or tea every morning may be the culprit behind frequent trips to the bathroom.
How Caffeine Affects Your Body, From Your Brain to Your Bladder – LIVESTRONG.COM
