Evidence supporting the use of: Water
For the health condition: Bladder Infection

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Water is widely recognized in scientific literature as an important supportive measure in the management and prevention of bladder infections (urinary tract infections, or UTIs). Increased fluid intake, particularly water, helps dilute urine and promotes more frequent urination. This increased urination assists in flushing out bacteria from the urinary tract, reducing bacterial load and helping to prevent the establishment and persistence of infection. Several clinical guidelines, including those from the Infectious Diseases Society of America (IDSA), recommend increased fluid intake as a non-pharmacologic intervention for both preventing and supporting the treatment of uncomplicated bladder infections.

A randomized controlled trial published in JAMA Internal Medicine (2018) found that women prone to recurrent UTIs who increased their water intake had significantly fewer infections compared to those who maintained their usual fluid consumption. While water alone is not a cure for a bladder infection—antibiotics are usually necessary for active infections—it remains a scientifically validated adjunctive therapy. Traditional advice also historically emphasized drinking plenty of fluids, but the current recommendation is grounded in solid scientific evidence. The evidence rating is not a full 5, as water is supportive rather than curative, but the recommendation is strong for its role in prevention and supportive care.

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