Name: Steven R.
I would like to know why caffeine causes a person to
urinate more often. I would also like to know what it does to the body
(specifically) to urinate more frequently.
Caffeine and theophyline are xanthines found in coffee and tea and cause
increased glomerular (the kidney's filter) filtration rate (increased kidney
filktration) and inhibit proximal tubular Na reabsorption which helps
eliminate more water.
Peter Faletra Ph.D.
Office of Science
Department of Energy