What effect does caffeine have on the urinary system?

Caffeine acts as a diuretic, which means it promotes the production of urine. This occurs because caffeine inhibits the reabsorption of sodium in the kidneys, leading to increased sodium and water excretion. The diuretic effect of caffeine can result in more frequent urination and a greater volume of urine produced. This is particularly noticeable in individuals who may not regularly consume caffeine, as their bodies are less accustomed to its effects. Overall, understanding caffeine's role as a diuretic helps explain its influence on urinary output and fluid balance in the body.