When your bladder isn't happy, it has a way of making sure you know about it — and usually at the most inconvenient times. One natural compound that may help support your urinary tract is D-mannose, a simple sugar found naturally in fruits such as cranberries. Unlike more familiar sugars, very little is metabolized by your body. Much of it is filtered through your kidneys and ends up in your urine, which is precisely what makes D-mannose interesting for supporting a healthy bladder and urinary tract.
Once D-mannose reaches your urinary tract, it may help keep certain unwanted bacteria from attaching to the walls of your bladder so they can instead be flushed away during normal urination. Research has focused particularly on E. coli, a common cause of urinary tract infections. Some studies suggest D-mannose may be useful for people who experience recurrent UTIs, although larger studies are still needed to confirm its effectiveness.
D-mannose may offer benefits beyond the bladder as well. Emerging research suggests it may act as a prebiotic that supports beneficial gut bacteria and the production of short-chain fatty acids involved in maintaining your intestinal lining and immune health, although more human research is needed. For everyday urinary tract support, other simple strategies include drinking enough water, emptying your bladder when you feel the urge and maintaining good hygiene.
SOURCE:
Health, September 28, 2026