Cranberry (Vaccinium macrocarpon) is the best-known natural remedy for protecting the urinary tract. Its proanthocyanidins (PACs) make it harder for bacteria to attach to the bladder wall.
How cranberry works
Type-A PACs stop E. coli from adhering to the urinary lining, so they are flushed out more easily – natural protection against recurring urinary tract infections.
What to look for
- Check the PAC content (around 36 mg daily is considered effective)
- Concentrated extracts (e.g. 25:1) rather than sugary juices
- Take regularly, especially if prone to infections
Caution & when to see a doctor
Cranberry is for prevention – an acute infection with fever, flank pain or blood in the urine needs medical care (antibiotics). With blood thinners (e.g. warfarin), check first. Cranberry contains oxalate; with known oxalate stones, watch the amount.
FAQ
Juice or capsules? Concentrated capsules deliver PACs without the sugar of juices.
Who is it for? Mainly preventing frequent bladder infections.
You'll find high-dose cranberry products in our recommendations below.
