TheraCran One by Theralogix

Recurrent urinary tract infections are the main reason to use cranberry extract for UTI prevention. It’s most helpful for women who get repeat infections, those with postcoital UTIs (after sex), and people aiming to cut down on preventive antibiotics. If you’ve had a recent infection, confirm clearance with a urinalysis and, when used, a urine culture before relying on prevention. This dose is also reasonable for men with recurrent UTIs, though data are strongest in women.

Cranberry extract is standardized here to 36 mg of proanthocyanidins (PACs) by the BL-DMAC method, the assay used in most clinical trials. These PACs have A-type linkages that reduce how well uropathogenic E. coli (the most common UTI bacteria) can stick to bladder cells. Think of it as blunting the bacteria’s adhesins, the grappling hooks they use to latch on, which lowers the chance an exposure turns into an infection.

Take one capsule with food once daily; that provides the 36 mg PAC target used in studies. Most people who respond notice fewer infections within 4 to 12 weeks, so stay consistent. During stretches of higher risk, such as around sexual activity or travel, some clinicians keep daily dosing and add timing near the trigger, though evidence on exact timing is limited. Cranberry does not treat an active UTI—start antibiotics promptly if you develop typical symptoms.

History of calcium oxalate kidney stones is a reason to reconsider, since cranberry can raise urinary oxalate (a stone-forming compound). If you take warfarin (a blood thinner), use caution and involve your prescriber; rare interactions have been reported with cranberry concentrates. Pregnancy and breastfeeding appear low risk, but discuss with your obstetric clinician. Common side effects are mild stomach upset; take with food or stop if diarrhea or reflux persists.