Preventing urinary tract infections (UTIs)
Cranberries are the most promising nonpharmacological option for preventing UTIs that is also safe and well tolerated. Proanthocyanidins (PACs), the flavonoids in cranberries, are responsible for UTI prevention by inhibiting the adhesion of E. coli to the urinary tract wall. The PACs in cranberries contain a unique A-type linkage in their structure, while most other foods contain only the more common B-type PACs. The PACs are absorbed rapidly from the gastrointestinal tract and excreted in the urine. The unique molecular structure explains why cranberries are the only food associated with urinary tract health.