BTW - if you google that question, you'll get the following response:

"Drinking alkaline water will raise the pH of your bodily fluids. Blood pH is affected within minutes because alkaline water is absorbed quickly by the body. It takes about a half hour or more for it to affect your urine pH, and saliva pH would be raised almost immediately, but the effect is short-lived."

If you drink it throughout the day, it will raise your pH throughout the day.